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vascular    音標拼音: [v'æskjəlɚ]
a. 脈管的,有脈管的,血管的

脈管的,有脈管的,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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