Hypertext Webster Gateway: "vesicle"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Vesicle \Ves"i*cle\, n. [L. vesicula, dim. of vesica a bladder,
blister; akin to Skr. vasti bladder: cf. F. v['e]sicule.]
A bladderlike vessel; a membranous cavity; a cyst; a cell.
Specifically:
(a) (Bot.) A small bladderlike body in the substance of
vegetable, or upon the surface of a leaf.
(b) (Med.) A small, and more or less circular, elevation of
the cuticle, containing a clear watery fluid.
(c) (Anat.) A cavity or sac, especially one filled with
fluid; as, the umbilical vesicle.
(d) (Zo["o]l.) A small convex hollow prominence on the
surface of a shell or a coral.
(e) (Geol.) A small cavity, nearly spherical in form, and
usually of the size of a pea or smaller, such as are
common in some volcanic rocks. They are produced by the
liberation of watery vapor in the molten mass.
From WordNet (r) 1.7 (wn)
vesicle
n : a small anatomically normal sac or bladderlike structure
(especially one containing fluid) [syn: {cyst}]
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