Definition of vesicle

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ves·i·cle

-k

l) KEY

NOUN:

A small bladderlike cell or cavity.
Anatomy A small sac or cyst, especially one containing fluid.
Pathology A serum-filled blister formed in or beneath the skin.
Geology A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.

ETYMOLOGY:
Middle English, from Old French vesicule, from Latin vscula, diminutive of vsca, bladder, blister

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