vascular 音标拼音: [v'æskjəlɚ]
a . 脉管的,有脉管的,血管的
脉管的,有脉管的,血管的
vascular adj 1 :
of or relating to or having vessels that conduct and circulate fluids ; "
vascular constriction "; "
a vascular bundle " [
ant : {
avascular }]
Vascular \
Vas "
cu *
lar \,
a . [
L .
vasculum a small vessel ,
dim .
of vas vessel :
cf .
F .
vasculaire .
See {
Vase },
and cf .
Vessel .]
[
1913 Webster ]
1 . (
Biol .)
(
a )
Consisting of ,
or containing ,
vessels as an essential part of a structure ;
full of vessels ;
specifically (
Bot .),
pertaining to ,
or containing ,
special ducts ,
or tubes ,
for the circulation of sap .
(
b )
Operating by means of ,
or made up of an arrangement of ,
vessels ;
as ,
the vascular system in animals ,
including the arteries ,
veins ,
capillaries ,
lacteals ,
etc .
(
c )
Of or pertaining to the vessels of animal and vegetable bodies ;
as ,
the vascular functions .
[
1913 Webster ]
2 . (
Bot .)
Of or pertaining to the higher division of plants ,
that is ,
the phaenogamous plants ,
all of which are vascular ,
in distinction from the cryptogams ,
which to a large extent are cellular only .
[
1913 Webster ]
{
Vascular plants } (
Bot .),
plants composed in part of vascular tissue ,
as all flowering plants and the higher cryptogamous plants ,
or those of the class Pteridophyta .
Cf . {
Cellular plants },
under {
Cellular }.
{
Vascular system } (
Bot .),
the body of associated ducts and woody fiber ;
the fibrovascular part of plants .
{
Vascular tissue } (
Bot .),
vegetable tissue composed partly of ducts ,
or sap tubes .
{
Water vascular system } (
Zool .),
a system of vessels in annelids ,
nemerteans ,
and many other invertebrates ,
containing a circulating fluid analogous to blood ,
but not of the same composition .
In annelids the fluid which they contain is usually red ,
but in some it is green ,
in others yellow ,
or whitish .
[
1913 Webster ]
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