ves·i·cle /ˈvɛsɪkəl/ 名詞
Ves·i·cle n. A bladderlike vessel; a membranous cavity; a cyst; a cell. Specifically: --
(a) Bot. A small bladderlike body in the substance of a 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) Zool. 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.
n : a small anatomically normal sac or bladderlike structure
(especially one containing fluid) [syn: cyst]