ˈvesə̇kəl, -sēk- noun
( -s )
Etymology: Middle French vesicule, from Latin vesicula small bladder, small blister, diminutive of vesica bladder, blister — more at vesica
: a body felt to resemble a bladder especially in constituting a small thin-walled cavity: as
a. : a plant or animal structure (as a cyst, vacuole, or cell) having the general form of a membranous cavity : a thin sac especially when filled with fluid
b. : minute bubbles formerly held to make up the substance of a cloud or fog
c. : a small and more or less circular elevation of the cuticle of the skin containing a clear watery fluid : blister
d. : a small cavity in a mineral or rock and especially in a basaltic lava produced ordinarily by the expansion of vapor in the molten mass