Vesicle

Ves"i*cle

(?), n. [L. vesicula, dim. of vesica a bladder, blister; akin to Skr. vasti bladder: cf. F. vsicule.] A bladderlike vessel; a membranous cavity; a cyst; a cell. Specifically: --
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(a) (Bot.) A small bladderlike body in the substance of a vegetable, or upon the surface of a leaf.
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(b) (Med.) A small, and more or less circular, elevation of the cuticle, containing a clear watery fluid.
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(c) (Anat.) A cavity or sac, especially one filled with fluid; as, the umbilical vesicle.
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(d) (Zol.) A small convex hollow prominence on the surface of a shell or a coral.
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(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.
[1913 Webster]

 

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Tue 11th December 2018