sac

1 of 4

noun

ˈsak 

: a pouch within an animal or plant often containing a fluid

a synovial sac

saclike

ˈsak-ˌlīk 

adjective

sac

2 of 4

abbreviation (1)

sacrifice

Sac

3 of 4

variant of sauk

SAC

4 of 4

abbreviation

1

special agent in charge

2

Strategic Air Command

Examples of sac in a Sentence

Recent Examples on the Web

Noun

That yard is in the middle of a cul de sac completely surrounded by other houses with kids running around and jumping on trampolines. —Denise Snodell, Kansas City Star, 7 June 2025

Two pairs of the 30 toads recently bred and laid thousands of eggs in long, stringy, gelatinous sacs that days later morphed into tiny tadpoles. —Adriana Pérez, Chicago Tribune, 3 June 2025

One dying German cockroach with an egg sac was at the rear of the facility behind the upright freezer. —Veronica Fernandez-Alvarado, Sacbee.com, 9 May 2025

The substance is an oil sac that helps the whales focus sound. —Saleen Martin, USA Today, 6 May 2025

Word History

Etymology

Noun

French, literally, bag, from Latin saccus — more at sack

First Known Use

Noun

1741, in the meaning defined above

Phrases Containing sac

• air sac
• amniotic sac
• cul-de-sac
• embryo sac
• honey sac
• pollen sac
• sac bunt
• sac fly
• sac fungus
• yolk sac

Rhymes for sac

• ack
• brack
• clack
• crack
• dak
• flack
• flak
• hack
• jack
• knack
• lac
• lack

Kids Definition

sac

noun

ˈsak

: a pouch in an animal or plant often containing a fluid

a food-storage sac

saclike

-ˌlīk

adjective

Medical Definition

sac

noun

ˈsak 

: a soft-walled anatomical cavity usually having a narrow opening or none at all and often containing a special fluid

a synovial sac

see air sac, amniotic sac, dental sac, lacrimal sac