vesicle

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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

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.
References in periodicals archive ?
haplonema is unique in having bidirectional chemical synapses in which clear vesicles are found on only one side of the synaptic junction and dense-core vesicles are found on the other side.
However, some neuromuscular junctions do occur in cnidarians and can be recognized by the presence of dense-cored or clear vesicles (80-100 nm in diameter) aligned on the presynaptic side of a pair of electron-dense synaptic membranes separated by a 15-25 nm-wide cleft (Westfall, 1973).
P29: a novel tyrosine-phosphorylated membrane protein present in small clear vesicles of neurons and endocrine cells.