sac

5 definitions • 4 examples

a part of a plant or animal that is like a bag and often contains liquid, or a similar artificially made structure:

Bursa are fluid-filled sacs throughout the body whose function is to reduce friction between muscles and tendons as they move over bones.

A sac of saline solution is then inserted into the cavity.

a type of abscess (= swollen area containing a thick yellow liquid) under the skin:

Sacs of pus, called abscesses, may form in the pelvis.

a covering that surrounds a tumour

in baseball, a sacrifice (= an occasion when a player intentionally hits the ball in a way that ends his turn, in order to allow another player to run to the next base):

a sac bunt

a part inside a plant or animal which is like a small bag and contains liquid or air