There are 2 definitions of SAC in English:


Line breaks: SAC


  • Senior Aircraftman.

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Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little

There are 2 definitions of SAC in English:


Line breaks: sac


  • 1A hollow, flexible structure resembling a bag or pouch: a fountain pen with an ink sac
    More example sentences
    • Rain Reviva is a system of flexible plastic sacs for storing rainwater - or recycling waste water - under the house.
    • As the air filled the sac, the balloon took on an impossibly long shape.
    • Reseal the plastic sac and leave it rocking for 1 h at room temperature.
    bag, pouch, bladder, blister
    technical bursa, acinus, follicle, cyst, saccule, utricle, vesicle, vesica, vesicula, theca, liposome
  • 1.1A cavity within an organism, enclosed by a membrane and containing air, liquid, or solid structures.
    More example sentences
    • In the field of biology, biochemists have been studying vesicles, the small membrane sacs found within cells.
    • Fistulas commonly extend from the rectal sac to the perineum or genital tract in a female, or to the urinary tract in a male.
    • If chemicals are splashed into the eye, the eye and the conjunctival sacs should be washed out immediately with copious amounts of water.
  • 1.2The distended membrane surrounding a hernia, cyst, or tumour.
    More example sentences
    • If the leak persists or the aneurysmal sac enlarges, intervention becomes necessary.
    • In the vicinity of this mass, there was a hernia sac.
    • As people get older, fluid-filled sacs, called ‘cysts,’ can form in the kidneys.



More example sentences
  • The cnidarians (hydra, jellyfish, and sea anemones) and helminths have a sac-like digestive system with a single opening.
  • Chlorosomes, found only in green photosynthetic bacteria, are large supramolecular sac-like complexes that are attached to the cytoplasmic side of the inner cell membrane.
  • The saccular or cystic form is the most severe type and is characterized by a ballooning of the bronchi with fluid-filled, sac-like dilatations.


mid 18th century (as a term in biology): from French sac or Latin saccus 'sack, bag'.

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