Medical Dictionary


noun ves·i·cle \ˈves-i-kəl\

Medical Definition of VESICLE

a :  a membranous and usually fluid-filled pouch (as a cyst, vacuole, or cell) in a plant or animal b :  synaptic vesicle
:  a small abnormal elevation of the outer layer of skin enclosing a watery liquid :  blister
:  a pocket of embryonic tissue that is the beginning of an organ—see auditory vesicle, brain vesicle, optic vesicle
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