A vesicle is a tiny cavity or sac in an animal, even a human animal. Vesicles are like bladders or blisters, and they usually hold fluid. They’re really small.

Vesicle is from the Latin word vesicular for “bladder or blister.” A vesicle is like a little bladder, because it's a fluid-filled sac in an animal, like little organic bags of liquid. The other key element of a vesicle is that it's small — vesicles tend to be extremely tiny. They’re so small, that some are inside cells, as membrane-bound spheres that are separate from the surrounding cytoplasm. That’s tiny!

Definitions of vesicle

n a small anatomically normal sac or bladderlike structure (especially one containing fluid)

show 10 types...
hide 10 types...
dacryocyst, lacrimal sac, tear sac
either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands
Golgi apparatus, Golgi body, Golgi complex, dictyosome
a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions)
bleb, blister, bulla
(pathology) an elevation of the skin filled with serous fluid
any small spherical group of cells containing a cavity
an artificially made microscopic vesicle into which nucleic acids can be packaged; used in molecular biology as a transducing vector
hair follicle
a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with them
Graafian follicle
a vascular body in a mammalian ovary enclosing a developing egg
water blister
blister containing a nonpurulent clear watery content
blood blister
blister containing blood or bloody serum usually caused by an injury
a small inflamed elevation of skin containing pus; a blister filled with pus
Type of:
a structure resembling a bag in an animal

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, can put you on the path to systematic vocabulary improvement.