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tooth    音标拼音: [t'uθ]
n. 牙齿,齿状物,嗜好
vt. 装以齿,咬,将…切成齿状
vi. 啮合

牙齿,齿状物,嗜好装以齿,咬,将…切成齿状啮合

tooth
n 1: hard bonelike structures in the jaws of vertebrates; used
for biting and chewing or for attack and defense
2: something resembling the tooth of an animal
3: toothlike structure in invertebrates found in the mouth or
alimentary canal or on a shell
4: a means of enforcement; "the treaty had no teeth in it"
5: one of a number of uniform projections on a gear

Tooth \Tooth\ (t[=oo]th), n.; pl. {Teeth} (t[=e]th). [OE.
toth,tooth, AS. t[=o][eth]; akin to OFries. t[=o]th, OS. & D.
tand, OHG. zang, zan, G. zahn, Icel. t["o]nn, Sw. & Dan.
tand, Goth. tumpus, Lith. dantis, W. dant, L. dens, dentis,
Gr. 'odoy`s, 'odo`ntos, Skr. danta; probably originally the
p. pr. of the verb to eat. [root]239. Cf. {Eat}, {Dandelion},
{Dent} the tooth of a wheel, {Dental}, {Dentist}, {Indent},
{Tine} of a fork, {Tusk}. ]
1. (Anat.) One of the hard, bony appendages which are borne
on the jaws, or on other bones in the walls of the mouth
or pharynx of most vertebrates, and which usually aid in
the prehension and mastication of food.
[1913 Webster]

Note: The hard parts of teeth are principally made up of
dentine, or ivory, and a very hard substance called
enamel. These are variously combined in different
animals. Each tooth consist of three parts, a crown, or
body, projecting above the gum, one or more fangs
imbedded in the jaw, and the neck, or intermediate
part. In some animals one or more of the teeth are
modified into tusks which project from the mouth, as in
both sexes of the elephant and of the walrus, and in
the male narwhal.
In adult man there are thirty-two teeth, composed
largely of dentine, but the crowns are covered with
enamel, and the fangs with a layer of bone called
cementum. Of the eight teeth on each half of each jaw,
the two in front are incisors, then come one canine,
cuspid, or dog tooth, two bicuspids, or false molars,
and three molars, or grinding teeth. The milk, or
temporary, teeth are only twenty in number, there being
two incisors, one canine, and two molars on each half
of each jaw. The last molars, or wisdom teeth, usually
appear long after the others, and occasionally do not
appear above the jaw at all.
[1913 Webster]

How sharper than a serpent's tooth it is
To have a thankless child! --Shak.
[1913 Webster]

2. Fig.: Taste; palate.
[1913 Webster]

These are not dishes for thy dainty tooth. --Dryden.
[1913 Webster]

3. Any projection corresponding to the tooth of an animal, in
shape, position, or office; as, the teeth, or cogs, of a
cogwheel; a tooth, prong, or tine, of a fork; a tooth, or
the teeth, of a rake, a saw, a file, a card.
[1913 Webster]

4.
(a) A projecting member resembling a tenon, but fitting
into a mortise that is only sunk, not pierced through.
(b) One of several steps, or offsets, in a tusk. See
{Tusk}.
[1913 Webster]
[1913 Webster]

5. (Nat. Hist.) An angular or prominence on any edge; as, a
tooth on the scale of a fish, or on a leaf of a plant;
specifically (Bot.), one of the appendages at the mouth of
the capsule of a moss. See {Peristome}.
[1913 Webster]

6. (Zool.) Any hard calcareous or chitinous organ found in
the mouth of various invertebrates and used in feeding or
procuring food; as, the teeth of a mollusk or a starfish.
[1913 Webster]

{In spite of the teeth}, in defiance of opposition; in
opposition to every effort.

{In the teeth}, directly; in direct opposition; in front.
"Nor strive with all the tempest in my teeth." --Pope.

{To cast in the teeth}, to report reproachfully; to taunt or
insult one with.

{Tooth and nail}, as if by biting and scratching; with one's
utmost power; by all possible means. --L'Estrange. "I
shall fight tooth and nail for international copyright."
--Charles Reade.

{Tooth coralline} (Zool.), any sertularian hydroid.

{Tooth edge}, the sensation excited in the teeth by grating
sounds, and by the touch of certain substances, as keen
acids.

{Tooth key}, an instrument used to extract teeth by a motion
resembling that of turning a key.

{Tooth net}, a large fishing net anchored. [Scot.]
--Jamieson.

{Tooth ornament}. (Arch.) Same as {Dogtooth}, n., 2.

{Tooth powder}, a powder for cleaning the teeth; a
dentifrice.

{Tooth rash}. (Med.) See {Red-gum}, 1.

{To show the teeth}, to threaten. "When the Law shows her
teeth, but dares not bite." --Young.

{To the teeth}, in open opposition; directly to one's face.
"That I shall live, and tell him to his teeth ." --Shak.
[1913 Webster]


Tooth \Tooth\, v. t. [imp. & p. p. {Toothed}; p. pr. & vb. n.
{Toothing}.]
1. To furnish with teeth.
[1913 Webster]

The twin cards toothed with glittering wire.
--Wordsworth.
[1913 Webster]

2. To indent; to jag; as, to tooth a saw.
[1913 Webster]

3. To lock into each other. See {Tooth}, n., 4. --Moxon.
[1913 Webster]

118 Moby Thesaurus words for "tooth":
Vandyke, aftertaste, asperity, baby tooth, bicuspid, bitter, blaze,
bucktooth, bumpiness, canine, chop, choppiness, coarsen, cog, comb,
crag, cragginess, crenellate, crenulate, crimp, crown, cuspid, cut,
cutter, deciduous tooth, dent, denticle, denticulation, dentil,
dentition, dogtooth, eyetooth, fang, flavor, fore tooth, gagtooth,
gang tooth, gash, gold tooth, grain, granulate, granulation,
grinder, gust, harrow, harshness, hispidity, incise, incisor,
indent, inequality, irregularity, jag, jaggedness, joltiness,
knurl, machicolate, milk tooth, mill, molar, nick, nonuniformity,
notch, palate, peak, pecten, peg, permanent tooth, picot, pink,
pivot tooth, premolar, projection, raggedness, rake, ratchet,
relish, rough air, roughen, roughness, ruggedness, rugosity, salt,
sapidity, sapor, savor, savoriness, sawtooth, scallop, scarify,
score, scotch, scraggliness, scrivello, serrate, slash, smack,
smooth, snag, snaggle, snaggletooth, sour, spire, sprocket, spur,
steeple, stomach, sweet, tang, taste, tongue, turbulence, tush,
tusk, unevenness, unsmoothness, ununiformity, wisdom tooth

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  • Human tooth - Wikipedia
    Teeth are made of multiple tissues of varying density and hardness Humans, like most other mammals, are diphyodont, meaning that they develop two sets of teeth The first set, deciduous teeth, also called "primary teeth", "baby teeth", or "milk teeth", normally eventually contains 20 teeth
  • Child and Adult Dentition (Teeth) - Structure - TeachMeAnatomy
    The human dentition is composed of two sets of teeth - primary and permanent Teeth are organised into two opposing arches - maxillary (upper) and mandibular (lower) These can be divided down the midline (mid-sagittal plane) into left and right halves
  • Types of Teeth, Anatomy Diagram, Name, Number and Functions
    There are four types of teeth in adult humans Incisors, Canines, Premolars, and Molars; Premolars are absent in children Adult humans have 32 permanent teeth in their mouths, and children have 20 teeth in their mouths 1 Incisors These are your front teeth or anterior teeth
  • Tooth | Definition, Anatomy, Facts | Britannica
    A tooth is any of the hard, resistant structures occurring on the jaws and in or around the mouth and pharynx areas of vertebrates Teeth are used for catching and masticating food, for defense, and for other specialized purposes
  • Teeth: Anatomy, Types, Function Care - Cleveland Clinic
    There are four types of permanent teeth in humans: Incisors Canines Premolars Molars Your incisors are the most visible teeth in your mouth Most people have four incisors on the upper jaw and four on the lower These include your front two teeth and the teeth on either side of them
  • The Human Teeth: Anatomy and 3D Illustrations - Innerbody
    Each tooth is an organ consisting of three layers: the pulp, dentin, and enamel The pulp of the tooth is a vascular region of soft connective tissues in the middle of the tooth
  • TOOTH Definition Meaning - Merriam-Webster
    The meaning of TOOTH is one of the hard bony appendages that are borne on the jaws or in many of the lower vertebrates on other bones in the walls of the mouth or pharynx and serve especially for the prehension and mastication of food and as weapons of offense and defense
  • Your Tooth Number Chart | How Are Your Teeth Numbered?
    The good news is, it’s easy to learn how to read your dental chart, commonly called a tooth number chart With this guide to how your teeth are numbered, you can feel more confident and prepared ahead of your next important dental procedure





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