[ sak ]
/ sæk /


a baglike structure in an animal, plant, or fungus, as one containing fluid.

Origin of sac

1735–45; < Latin saccus sack1

Related forms

sac·like, adjective

Can be confused

bag sac sack sacque

Definition for sac (2 of 3)


[ sak, sawk ]
/ sæk, sɔk /

noun, plural Sacs, (especially collectively) Sac.

Definition for sac (3 of 3)


or S.A.C.

[ sak ]
/ sæk /


Strategic Air Command. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sac

British Dictionary definitions for sac (1 of 2)


/ (sæk) /


a pouch, bag, or pouchlike part in an animal or plant

Derived Forms

saclike, adjective

Word Origin for sac

C18: from French, from Latin saccus; see sack 1

British Dictionary definitions for sac (2 of 2)


abbreviation for (in Britain)

Special Area of Conservation

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for sac


[ săk ]


A pouch or bursa.
An encysted abscess at the root of a tooth.
The capsule of a tumor or the envelope of a cyst.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for sac


[ săk ]

A pouch or pouch-shaped structure in an animal or plant, often containing liquids. The human bladder is a sac.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.