noun
sac
SAK/sæk/
A pouchlike structure that holds or encloses something.
The cutaway anther reveals a small sac filled with pollen.
Etymology
The underlying image is a bag: a biological sac is a pouchlike pocket or receptacle, named for its resemblance to an ordinary container.
In context
inside your belly within the sac that contains your intestines
More examples
- A spider wraps her eggs in a protective silk sac.
- Tiny air sacs in the lungs fill with each breath.
- The yolk sac supplies nutrients to the developing embryo.
Forms
sac · sacs