(Latin) vesicula, diminutive of vesica a bladder, blister; akin to Sanskrit vasti bladder: confer (French) vésicule.
A bladderlike vessel; a membranous cavity; a cyst; a cell. Specifically: --(a, Botanical) A small bladderlike body in the substance of vegetable, or upon the surface of a leaf. (b, Medicine) A small, and more or less circular, elevation of the cuticle, containing a clear watery fluid. (c, Anatomy) A cavity or sac, especially one filled with fluid; as, the umbilical vesicle. (d, Zoölogy) A small convex hollow prominence on the surface of a shell or a coral. (e, Geology) 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.
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From French vésicule or its source, Latin vēsīcula.
vesicle (plural vesicles) (cytology) A membrane-bound compartment found in a cell. A small bladder-like cell or cavity. (anatomy) A small sac or cyst or vacuole, especially one containing fluid. A blister formed in or beneath the skin, containing serum. A bleb. (anatomy) A pocket of embryonic tissue that is the beginning of an organ. (geology) A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification. 2004, Richard Fortey, The Earth, Folio Society 2011, p. 51: It frequently contains holes, or vesicles, especially nearer the surface of a flow where gas has escaped.
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