rhizoverbBeta
DictionaryvesicleBiological sac
noun

vesicle

VES-ih-kul/ˈvesɪkl/

A small enclosed sac or cavity containing fluid or gas.

The tiny vesicle encloses clear fluid beneath a thin dome of skin.

An isolated magnified cutaway of a tiny clear blister in skin tissue, showing a thin, dome-shaped tissue roof enclosing a small pocket of transparent fluid above the underlying tissue.
Etymology
vesicleLatinlittle blister

Latin vesicula meant a 'little blister,' a diminutive of the word for 'bladder.' That small, hollow container image underlies the anatomical name for a fluid-filled sac.

In context

CrashCourse10:21
… folds in a little to form the beginning of a channel and then pinches off to form a vesicle that holds the fluid.
In Da Club - Membranes & Transport: Crash Course Biology #5

More examples

  • The rash includes several small vesicles filled with clear fluid.
  • Each vesicle in this volcanic rock marks a trapped gas bubble.
  • A thin membrane surrounds the vesicle inside the cell.

Forms

vesicle · vesicles

vesicular adjective — Relating to or resembling small sacs.

Similar words

sac
A broader term for a pouch in living tissue.
cavity
Any hollow space, not necessarily small or fluid-filled.
blister
A fluid-filled swelling, especially on the surface of skin.