vesicle

vesicle

1. Pathol

a. any small sac or cavity, esp one containing serous fluid

b. a blister

2. Geology a rounded cavity within a rock formed during solidification by expansion of the gases present in the magma

3. Botany a small bladder-like cavity occurring in certain seaweeds and aquatic plants

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

vesicle

[′ves·ə·kəl]

(biology)

A small, thin-walled bladderlike cavity, usually filled with fluid.

(geology)

A cavity in lava formed by entrapment of a gas bubble during solidification. Also known as air sac; bladder; saccus; vacuole; wing.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.