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

Follicle cysts form when the tiny sac (called a follicle) that houses the maturing egg during your cycle doesn’t break open as usual to release said egg. —Korin Miller, SELF, 22 Apr. 2025

Six dead cockroaches and two egg sacs were on the floor under kitchen equipment and appliances, including a dry storage shelf, a rack of soda syrups, a freezer and two different sinks. —Camila Pedrosa, Sacramento Bee, 24 Jan. 2025

Like Desperate Housewives, Wisteria Lane will focus on a group of friends living on a seemingly picture-perfect cul de sac whose facade hides a boatload of secrets. —Rick Porter, HollywoodReporter, 29 Apr. 2025

Ovarian cysts are sacs filled with fluid that attach to or inside an ovary, according to Mayo Clinic. —Edward Segarra, USA Today, 23 Apr. 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