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

Every Tuesday and Friday after work, my neighbors and I drag a net-on-wheels into the cul de sac and start pickling. —Scott Maxwell, The Orlando Sentinel, 7 Apr. 2026

At the time, Harold's autopsy concluded his death was caused by multiple, serious cardiac issues including pericarditis, an inflammation of the sac around the heart. —Peter Van Sant, CBS News, 5 Apr. 2026

Musk is obtained from the musk pod, a preputial gland in a pouch, or sac, under the skin of the abdomen of the male musk deer. —Encyclopedia Britannica, 31 Mar. 2026

Is that oblong speck an egg sac or a flake of dandruff? —Tom Nichols, The Atlantic, 30 Mar. 2026

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