B 音标拼音: [b'i]
n . 字母
B 字母
B B 若
A 则反
B 闸
B 若
A 则反
B 闸
B B 暂存器(同
register ,
base )
B n 1 :
aerobic rod -
shaped spore -
producing bacterium ;
often occurring in chainlike formations ;
found primarily in soil [
synonym : {
bacillus }, {
B }]
2 :
originally thought to be a single vitamin but now separated into several B vitamins [
synonym : {
B -
complex vitamin }, {
B complex }, {
vitamin B complex }, {
vitamin B }, {
B vitamin }, {
B }]
3 :
a trivalent metalloid element ;
occurs both in a hard black crystal and in the form of a yellow or brown powder [
synonym :
{
boron }, {
B }, {
atomic number 5 }]
4 :
a logarithmic unit of sound intensity equal to 10 decibels [
synonym : {
Bel }, {
B }]
5 : (
physics )
a unit of nuclear cross section ;
the effective circular area that one particle presents to another as a target for an encounter [
synonym : {
barn }, {
b }]
6 :
the 2nd letter of the Roman alphabet [
synonym : {
B }, {
b }]
7 :
the blood group whose red cells carry the B antigen [
synonym :
{
B }, {
type B }, {
group B }]
Gastropoda \
Gas *
trop "
o *
da \,
n .
pl ., [
NL .,
fr .
Gr . ?, ?,
stomach -
poda .] (
Zool .)
One of the classes of Mollusca ,
of great extent .
It includes most of the marine spiral shells ,
and the land and fresh -
water snails .
They generally creep by means of a flat ,
muscular disk ,
or foot ,
on the ventral side of the body .
The head usually bears one or two pairs of tentacles .
See {
Mollusca }. [
Written also {
Gasteropoda }.]
[
1913 Webster ]
Note :
The Gastropoda are divided into three subclasses ;
viz .:
({
a })
The Streptoneura or Dioecia ,
including the Pectinibranchiata ,
Rhipidoglossa ,
Docoglossa ,
and Heteropoda . ({
b })
The Euthyneura ,
including the Pulmonata and Opisthobranchia . ({
c })
The Amphineura ,
including the Polyplacophora and Aplacophora .
[
1913 Webster ]
Infinitive \
In *
fin "
i *
tive \,
n . [
L .
infinitivus :
cf .
F .
infinitif .
See {
Infinite }.]
Unlimited ;
not bounded or restricted ;
undefined .
[
1913 Webster ]
{
Infinitive mood } (
Gram .),
that form of the verb which merely names the action ,
and performs the office of a verbal noun .
Some grammarians make two forms in English : ({
a })
The simple form ,
as ,
speak ,
go ,
hear ,
before which to is commonly placed ,
as ,
to speak ;
to go ;
to hear . ({
b })
The form of the imperfect participle ,
called the infinitive in -
ing ;
as ,
going is as easy as standing .
[
1913 Webster ]
Note :
With the auxiliary verbs may ,
can ,
must ,
might ,
could ,
would ,
and should ,
the simple infinitive is expressed without to ;
as ,
you may speak ;
they must hear ,
etc .
The infinitive usually omits to with the verbs let ,
dare ,
do ,
bid ,
make ,
see ,
hear ,
need ,
etc .;
as ,
let me go ;
you dare not tell ;
make him work ;
hear him talk ,
etc .
[
1913 Webster ]
Note :
In Anglo -
Saxon ,
the simple infinitive was not preceded by to (
the sign of modern simple infinitive ),
but it had a dative form (
sometimes called the gerundial infinitive )
which was preceded by to ,
and was chiefly employed in expressing purpose .
See {
Gerund },
2 .
[
1913 Webster ]
Note :
The gerundial ending (-
anne )
not only took the same form as the simple infinitive (-
an ),
but it was confounded with the present participle in -
ende ,
or -
inde (
later -
inge ).
[
1913 Webster ]
Labial \
La "
bi *
al \,
n .
1 . (
Phonetics )
A letter or character representing an articulation or sound formed or uttered chiefly with the lips ,
as {
b }, {
p }, {
w }.
[
1913 Webster ]
2 . (
Mus .)
An organ pipe that is furnished with lips ;
a flue pipe .
[
1913 Webster ]
3 . (
Zool .)
One of the scales which border the mouth of a fish or reptile .
[
1913 Webster ]
Legate \
Leg "
ate \ (
l [
e ^]
g "[
asl ]
t ),
n . [
OE .
legat ,
L .
legatus ,
fr .
legare to send with a commission or charge ,
to depute ,
fr .
lex ,
legis ,
law :
cf .
F .
l ['
e ]
gat ,
It .
legato .
See {
Legal }.]
1 .
An ambassador or envoy .
[
1913 Webster ]
2 .
An ecclesiastic representing the pope and invested with the authority of the Holy See .
[
1913 Webster ]
Note :
Legates are of three kinds : ({
a })
Legates a latere ,
now always cardinals .
They are called ordinary or extraordinary legates ,
the former governing provinces ,
and the latter class being sent to foreign countries on extraordinary occasions . ({
b })
Legati missi ,
who correspond to the ambassadors of temporal governments .
({
c })
Legati nati ,
or legates by virtue of their office ,
as the archbishops of Salzburg and Prague .
[
1913 Webster ]
3 . (
Rom .
Hist .)
(
a )
An official assistant given to a general or to the governor of a province .
(
b )
Under the emperors ,
a governor sent to a province .
[
1913 Webster ]
Libration \
Li *
bra "
tion \ (
l [-
i ]*
br [=
a ]"
sh [
u ^]
n ),
n . [
L .
libratio :
cf .
F .
libration .]
1 .
The act or state of librating . --
Jer .
Taylor .
[
1913 Webster ]
2 . (
Astron .)
A real or apparent libratory motion ,
like that of a balance before coming to rest .
[
1913 Webster ]
{
Libration of the moon },
any one of those small periodical changes in the position of the moon '
s surface relatively to the earth ,
in consequence of which narrow portions at opposite limbs become visible or invisible alternately .
It receives different names according to the manner in which it takes place ;
as : {(
a )}
Libration in longitude ,
that which ,
depending on the place of the moon in its elliptic orbit ,
causes small portions near the eastern and western borders alternately to appear and disappear each month .
({
b })
Libration in latitude ,
that which depends on the varying position of the moon '
s axis in respect to the spectator ,
causing the alternate appearance and disappearance of either pole . ({
c })
Diurnal or parallactic libration ,
that which brings into view on the upper limb ,
at rising and setting ,
some parts not in the average visible hemisphere .
[
1913 Webster ]
Monkey \
Mon "
key \,
n .;
pl . {
Monkeys }. [
Cf .
OIt .
monicchio ,
It .
monnino ,
dim .
of monna an ape ,
also dame ,
mistress ,
contr .
fr .
madonna .
See {
Madonna }.]
1 . (
Zool .)
(
a )
In the most general sense ,
any one of the Quadrumana ,
including apes ,
baboons ,
and lemurs .
(
b )
Any species of Quadrumana ,
except the lemurs .
(
c )
Any one of numerous species of Quadrumana (
esp .
such as have a long tail and prehensile feet )
exclusive of apes and baboons .
[
1913 Webster ]
Note :
The monkeys are often divided into three groups : ({
a })
{
Catarrhines },
or {
Simidae }.
These have an oblong head ,
with the oblique flat nostrils near together .
Some have no tail ,
as the apes .
All these are natives of the Old World . ({
b }) {
Platyrhines },
or {
Cebidae }.
These have a round head ,
with a broad nasal septum ,
so that the nostrils are wide apart and directed downward .
The tail is often prehensile ,
and the thumb is short and not opposable .
These are natives of the New World . ({
c })
{
Strepsorhines },
or {
Lemuroidea }.
These have a pointed head with curved nostrils .
They are natives of Southern Asia ,
Africa ,
and Madagascar .
[
1913 Webster ]
2 .
A term of disapproval ,
ridicule ,
or contempt ,
as for a mischievous child .
[
1913 Webster ]
This is the monkey '
s own giving out ;
she is persuaded I will marry her . --
Shak .
[
1913 Webster ]
3 .
The weight or hammer of a pile driver ,
that is ,
a very heavy mass of iron ,
which ,
being raised on high ,
falls on the head of the pile ,
and drives it into the earth ;
the falling weight of a drop hammer used in forging .
[
1913 Webster ]
4 .
A small trading vessel of the sixteenth century .
[
1913 Webster ]
{
Monkey boat }. (
Naut .)
(
a )
A small boat used in docks .
(
b )
A half -
decked boat used on the River Thames .
{
Monkey block } (
Naut .),
a small single block strapped with a swivel . --
R .
H .
Dana ,
Jr .
{
Monkey flower } (
Bot .),
a plant of the genus {
Mimulus }; --
so called from the appearance of its gaping corolla . --
Gray .
{
Monkey gaff } (
Naut .),
a light gaff attached to the topmast for the better display of signals at sea .
{
Monkey jacket },
a short closely fitting jacket ,
worn by sailors .
{
Monkey rail } (
Naut .),
a second and lighter rail raised about six inches above the quarter rail of a ship .
{
Monkey shine },
monkey trick . [
Slang ,
U .
S .]
{
Monkey trick },
a mischievous prank . --
Saintsbury .
{
Monkey wheel }.
See {
Gin block },
under 5th {
Gin }.
[
1913 Webster ]
Motion \
Mo "
tion \,
n . [
F .,
fr .
L .
motio ,
fr .
movere ,
motum ,
to move .
See {
Move }.]
1 .
The act ,
process ,
or state of changing place or position ;
movement ;
the passing of a body from one place or position to another ,
whether voluntary or involuntary ; --
opposed to {
rest }.
[
1913 Webster ]
Speaking or mute ,
all comeliness and grace attends thee ,
and each word ,
each motion ,
forms .
--
Milton .
[
1913 Webster ]
2 .
Power of ,
or capacity for ,
motion .
[
1913 Webster ]
Devoid of sense and motion . --
Milton .
[
1913 Webster ]
3 .
Direction of movement ;
course ;
tendency ;
as ,
the motion of the planets is from west to east .
[
1913 Webster ]
In our proper motion we ascend . --
Milton .
[
1913 Webster ]
4 .
Change in the relative position of the parts of anything ;
action of a machine with respect to the relative movement of its parts .
[
1913 Webster ]
This is the great wheel to which the clock owes its motion . --
Dr .
H .
More .
[
1913 Webster ]
5 .
Movement of the mind ,
desires ,
or passions ;
mental act ,
or impulse to any action ;
internal activity .
[
1913 Webster ]
Let a good man obey every good motion rising in his heart ,
knowing that every such motion proceeds from God . --
South .
[
1913 Webster ]
6 .
A proposal or suggestion looking to action or progress ;
esp .,
a formal proposal made in a deliberative assembly ;
as ,
a motion to adjourn .
[
1913 Webster ]
Yes ,
I agree ,
and thank you for your motion . --
Shak .
[
1913 Webster ]
7 . (
Law )
An application made to a court or judge orally in open court .
Its object is to obtain an order or rule directing some act to be done in favor of the applicant .
--
Mozley &
W .
[
1913 Webster ]
8 . (
Mus .)
Change of pitch in successive sounds ,
whether in the same part or in groups of parts .
[
1913 Webster ]
The independent motions of different parts sounding together constitute counterpoint . --
Grove .
[
1913 Webster ]
Note :
Conjunct motion is that by single degrees of the scale .
Contrary motion is that when parts move in opposite directions .
Disjunct motion is motion by skips .
Oblique motion is that when one part is stationary while another moves .
Similar or direct motion is that when parts move in the same direction .
[
1913 Webster ]
9 .
A puppet show or puppet . [
Obs .]
[
1913 Webster ]
What motion '
s this ?
the model of Nineveh ? --
Beau . &
Fl .
[
1913 Webster ]
Note :
Motion ,
in mechanics ,
may be simple or compound .
{
Simple motions }
are : ({
a })
straight translation ,
which ,
if of indefinite duration ,
must be reciprocating . ({
b })
Simple rotation ,
which may be either continuous or reciprocating ,
and when reciprocating is called oscillating . ({
c })
Helical ,
which ,
if of indefinite duration ,
must be reciprocating .
{
Compound motion }
consists of combinations of any of the simple motions .
[
1913 Webster ]
{
Center of motion }, {
Harmonic motion },
etc .
See under {
Center }, {
Harmonic },
etc .
{
Motion block } (
Steam Engine ),
a crosshead .
{
Perpetual motion } (
Mech .),
an incessant motion conceived to be attainable by a machine supplying its own motive forces independently of any action from without .
According to the law of conservation of energy ,
such perpetual motion is impossible ,
and no device has yet been built that is capable of perpetual motion .
[
1913 Webster PJC ]
Syn :
See {
Movement }.
[
1913 Webster ]
Respiration \
Res `
pi *
ra "
tion \ (
r ?
s `
p ?*
r ?"
sh ?
n ),
n . [
L .
respiratio :
cf .
F .
respiration .
See {
Respire }.]
1 .
The act of respiring or breathing again ,
or catching one '
s breath .
[
1913 Webster ]
2 .
Relief from toil or suffering :
rest . [
Obs .]
[
1913 Webster ]
Till the day Appear of respiration to the just And vengeance to the wicked . --
Milton .
[
1913 Webster ]
3 .
Interval ;
intermission . [
Obs .] --
Bp .
Hall .
[
1913 Webster ]
4 . (
Physiol .)
The act of resping or breathing ;
the act of taking in and giving out air ;
the aggregate of those processes bu which oxygen is introduced into the system ,
and carbon dioxide ,
or carbonic acid ,
removed .
[
1913 Webster ]
Note :
Respiration in the higher animals is divided into :
({
a })
Internal respiration ,
or the interchange of oxygen and carbonic acid between the cells of the body and the bathing them ,
which in one sense is a process of nutrition . ({
b })
External respiration ,
or the gaseous interchange taking place in the special respiratory organs ,
the lungs .
This constitutes respiration proper . --
Gamgee .
[
1913 Webster ]
In the respiration of plants oxygen is likewise absorbed and carbonic acid exhaled ,
but in the light this process is obscured by another process which goes on with more vigor ,
in which the plant inhales and absorbs carbonic acid and exhales free oxygen .
[
1913 Webster ]
Mute \
Mute \,
n .
1 .
One who does not speak ,
whether from physical inability ,
unwillingness ,
or other cause .
Specifically :
(
a )
One who ,
from deafness ,
either congenital or from early life ,
is unable to use articulate language ;
a deaf -
mute .
(
b )
A person employed by undertakers at a funeral .
(
c )
A person whose part in a play does not require him to speak .
(
d )
Among the Turks ,
an officer or attendant who is selected for his place because he can not speak .
[
1913 Webster ]
2 . (
Phon .)
A letter which represents no sound ;
a silent letter ;
also ,
a close articulation ;
an element of speech formed by a position of the mouth organs which stops the passage of the breath ;
as , {
p }, {
b }, {
d }, {
k }, {
t }.
[
1913 Webster ]
3 . (
Mus .)
A little utensil made of brass ,
ivory ,
or other material ,
so formed that it can be fixed in an erect position on the bridge of a violin ,
or similar instrument ,
in order to deaden or soften the tone .
[
1913 Webster ]
B \
B \ (
b [=
e ])
is the second letter of the English alphabet . (
See Guide to Pronunciation , [
sect ][
sect ]
196 ,
220 .)
It is etymologically related to p ,
v ,
f ,
w ,
and m ,
letters representing sounds having a close organic affinity to its own sound ;
as in Eng .
bursar and purser ;
Eng .
bear and Lat .
ferre ;
Eng .
silver and Ger .
silber ;
Lat .
cubitum and It .
gomito ;
Eng .
seven ,
Anglo -
Saxon seofon ,
Ger .
sieben ,
Lat .
septem ,
Gr ."
epta `,
Sanskrit saptan .
The form of letter B is Roman ,
from the Greek B (
Beta ),
of Semitic origin .
The small b was formed by gradual change from the capital B .
[
1913 Webster ]
Note :
In (
Music ),
B is the nominal of the seventh tone in the model major scale (
the scale of C major ),
or of the second tone in it '
s relative minor scale (
that of A minor ).
B [
flat ]
stands for B flat ,
the tone a half step ,
or semitone ,
lower than B .
In German ,
B stands for our B [
flat ],
while our B natural is called H (
pronounced h [
aum ]).
[
1913 Webster ]
Ferment \
Fer "
ment \,
n . [
L .
fermentum ferment (
in senses 1 &
2 ),
perh .
for fervimentum ,
fr .
fervere to be boiling hot ,
boil ,
ferment :
cf .
F .
ferment .
Cf .
1st {
Barm }, {
Fervent }.]
1 .
That which causes fermentation ,
as yeast ,
barm ,
or fermenting beer .
[
1913 Webster ]
Note :
Ferments are of two kinds : ({
a })
Formed or organized ferments . ({
b })
Unorganized or structureless ferments .
The latter are now called {
enzymes }
and were formerly called {
soluble ferments }
or {
chemical ferments }.
Ferments of the first class are as a rule simple microscopic vegetable organisms ,
and the fermentations which they engender are due to their growth and development ;
as ,
the {
acetic ferment },
the {
butyric ferment },
etc .
See {
Fermentation }.
Ferments of the second class ,
on the other hand ,
are chemical substances ;
as a rule they are proteins soluble in glycerin and precipitated by alcohol .
In action they are catalytic and ,
mainly ,
hydrolytic .
Good examples are pepsin of the dastric juice ,
ptyalin of the salvia ,
and disease of malt .
Before 1960 the term "
ferment "
to mean "
enzyme "
fell out of use .
Enzymes are now known to be {
globular protein }
s ,
capable of catalyzing a wide variety of chemical reactions ,
not merely hydrolytic .
The full set of enzymes causing production of ethyl alcohol from sugar has been identified and individually purified and studied .
See {
enzyme }.
[
1913 Webster PJC ]
2 .
Intestine motion ;
heat ;
tumult ;
agitation .
[
1913 Webster ]
Subdue and cool the ferment of desire . --
Rogers .
[
1913 Webster ]
the nation is in a ferment . --
Walpole .
[
1913 Webster ]
3 .
A gentle internal motion of the constituent parts of a fluid ;
fermentation . [
R .]
[
1913 Webster ]
Down to the lowest lees the ferment ran . --
Thomson .
[
1913 Webster ]
{
ferment oils },
volatile oils produced by the fermentation of plants ,
and not originally contained in them .
These were the quintessences of the alchemists . --
Ure .
[
1913 Webster ]
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