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

The cells are transported through the body to the sea slug’s appendages, where they are stored in sacs until they are fired off as a defense if the slug is under attack. —Brian Handwerk, Smithsonian Magazine, 12 June 2024

Basil’s essential oils live in microscopic sacs on parts of the plant. —Betty Cahill, The Denver Post, 11 June 2024

They are also known to lay 400 to 500 eggs in a single sac, with spiderlings emerging around June, according to PennState Extension. —Li Cohen, CBS News, 6 June 2024

Submarine sac That bug follows Sam and Ursula into a jellyfishlike animal’s egg sac, which resembles a laboratory flask — or a bottle with a message in it — bobbing in the water. —Roxana Hadadi, Vulture, 31 May 2024

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

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