- a pouch, bag, or pouchlike part in an animal or plant
WordReference Random House Learner's Dictionary of American English © 2026
sac /sæk/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Anatomy, Fungi, Zoologya baglike structure in an animal, plant, or fungus, esp. one containing fluid.
sac
(sak),USA pronunciation n.
sac′like′, adj.
Sac (sak, sôk),USA pronunciation n., pl. Sacs, (esp. collectively) Sac.
SAC (sak),USA pronunciation n.
- Anatomy, Fungi, Zoologya baglike structure in an animal, plant, or fungus, as one containing fluid.
- Latin saccus sack1
- 1735–45
Sac (sak, sôk),USA pronunciation n., pl. Sacs, (esp. collectively) Sac.
- Anthropology, Language VarietiesSauk.
SAC (sak),USA pronunciation n.
- MilitaryStrategic Air Command.
Collins Concise English Dictionary © HarperCollins Publishers::
sac /sæk/ n
'sac' also found in these entries (note: many are not synonyms or translations):
air bladder
- air sac
- allantois
- aneurysm
- bag
- bladder
- blind alley
- bursa
- caecum
- caul
- chorion
- cul-de-sac
- cyst
- -cyst
- dead end
- diverticulum
- follicle
- gallbladder
- ink
- ovule
- pericardium
- peritoneum
- Pleasence
- pouch
- saccule
- sachet
- sack
- siamang
- urinary bladder
- vesica
- vesicle
- wickiup
- yolk sac
- amniocentesis
- amniography
- amnion
- asco-
- ascomycete
- ascus
- bag of waters
- benediction
- Blessed Sacrament
- capsule
- cecum
- cheek pouch
- embryo sac
- endosome
- endosperm
- exocytosis
- extraembryonic membrane