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Definition of sac

sac

/sæk/
sac
Plural:sacs
•
Adjective:saclike
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sac Lexical Profile

sac Game Scores & Validity

• noun

1

A hollow, flexible, pouch-like structure or cavity in an animal, plant, or fungus, often containing fluid, air, or eggs.

Example

"The female spider spins a silken sac to protect her hundreds of tiny eggs until they hatch."

Synonyms
View all synonyms for sac

Word Nuance & Usage

Do not confuse "sac" with its homophone "sack." "Sac" is used almost exclusively in biological and anatomical contexts for a fluid-filled or air-filled pouch, whereas "sack" refers to a large bag made of cloth or paper.

• Rhymes for sac

• Nearby Words

saboteur
sabrina
sabyinyo
sac
sacagawea
sacajawea
saccharin

Word Origin & Etymology

Borrowed in the mid-18th century from French sac, from Latin saccus ("bag"), which came via Ancient Greek sakkos from a Semitic root meaning "coarse cloth" or "sackcloth."

Cite this Entry

Wordmom. (2026). Definition of Sac. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sac
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