sac
/sæk/
noun
- A bag-like part of a plant or animal that contains a liquid or air.
- Birds have an air sac that helps them breathe.
- The spider's venom sac contains poison.
- The plant's pollen sac burst open in the wind.
- A pouch or bag made of a flexible material, used for holding things.
- She carried her lunch in a small sac.
- He filled the sac with coins from the fountain.
- The flour was stored in a cloth sac.