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

Over 3 gallons of the liquid, which is stored in a special intestinal sac, can be released at a time, according to NOAA. —Brendan Rascius, Miami Herald, 2 Sep. 2025

Understanding The Seed Debate Tomato seeds come wrapped in a gelatinous sac that can have a big affect on the texture and moisture level of your dish. —Katie Rosenhouse, Southern Living, 2 Sep. 2025

An examination found inflammation in the rotator cuff and fluid in the bursa sac, but no structural damage. —Bill Plunkett, Oc Register, 31 Aug. 2025

In one study, it was found that the disease triggered the development of sac-like molecules carrying blood-clotting proteins that increased stroke risk. —New Atlas, 28 Aug. 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