| / English Dictionary |
SAC
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A structure resembling a bag in an animal
Classified under:
Hypernyms ("sac" is a kind of...):
bodily cavity; cavity; cavum ((anatomy) a natural hollow or sinus within the body)
Hyponyms (each of the following is a kind of "sac"):
pericardial sac (the membrane surrounding the heart)
air cell; air sac; alveolus (a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways)
cyst; vesicle (a small anatomically normal sac or bladderlike structure (especially one containing fluid))
pocket; pouch ((anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican))
cistern; cisterna (a sac or cavity containing fluid especially lymph or cerebrospinal fluid)
bursa (a small fluid-filled sac located between movable parts of the body especially at joints)
acinus (one of the small sacs or saclike dilations in a compound gland)
bladder; vesica (a distensible membranous sac (usually containing liquid or gas))
saccule; sacculus (a small sac or pouch (especially the smaller chamber of the membranous labyrinth))
air sac (any of the thin-walled extensions of the tracheae of insects)
air sac (any of the membranous air-filled extensions of the lungs of birds)
air bladder; float; swim bladder (an air-filled sac near the spinal column in many fishes that helps maintain buoyancy)
coelenteron (the saclike body cavity of a coelenterate)
chorion (the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals))
amnion; amnios; amniotic sac (thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals))
umbilical vesicle; vesicula umbilicus; vitelline sac; yolk sac (membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional)
yolk sac (membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo)
Sense 2
Meaning:
A member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay
Synonyms:
Sac; Sauk
Classified under:
Hypernyms ("Sac" is a kind of...):
Algonquian; Algonquin (a member of any of the North American Indian groups speaking an Algonquian language and originally living in the subarctic regions of eastern Canada; many Algonquian tribes migrated south into the woodlands from the Mississippi River to the Atlantic coast)
Instance hyponyms:
Black Hawk; Makataimeshekiakiak (Sauk leader who in 1832 led Fox and Sauk warriors against the United States (1767-1838))
Keokuk (Sauk leader who aided the United States against Black Hawk (1790-1848))
Sense 3
Meaning:
A case or sheath especially a pollen sac or moss capsule
Synonyms:
sac; theca
Classified under:
Hypernyms ("sac" is a kind of...):
cover; covering; natural covering (a natural object that covers or envelops)
Sense 4
Meaning:
An enclosed space
Example:
the trapped miners found a pocket of air
Synonyms:
pocket; pouch; sac; sack
Classified under:
Nouns denoting two and three dimensional shapes
Hypernyms ("sac" is a kind of...):
cavity; enclosed space (space that is surrounded by something)
Context examples:
A yolk sac tumor that arises from the ovary and is characterized by the presence of multiple dilated spaces lined by cells that resemble mesothelial cells.
(Ovarian Yolk Sac Tumor, Polyvesicular Vitelline Pattern, NCI Thesaurus)
A yolk sac tumor that arises from the ovary and is characterized by the presence of extensive differentiation into hepatic tissue.
(Ovarian Yolk Sac Tumor, Hepatoid Pattern, NCI Thesaurus)
A yolk sac tumor that arises from the ovary and is characterized by the presence of extensive differentiation into endodermal type glandular structures.
(Ovarian Yolk Sac Tumor, Glandular Pattern, NCI Thesaurus)
A fluid-filled sac in the outer layer of skin.
(Blister, NCI Dictionary)
Representative examples include: germinoma, embryonal carcinoma, yolk sac tumor, choriocarcinoma, and teratoma.
(Central Nervous System Germ Cell Tumor, NCI Thesaurus)
An extraembryonic membrane in the form of a sac.
(Allantois, NCI Thesaurus)
Alveolar sacs and alveoli arise from the alveolar duct.
(Alveolar Duct, NCI Thesaurus)
The different germ cell components include choriocarcinoma, embryonal carcinoma, yolk sac tumor, teratoma, and seminoma.
(Mixed Germ Cell Tumor, NCI Thesaurus)
A molar pregnancy contains many cysts (sacs of fluid).
(Molar pregnancy, NCI Dictionary)
Pregnancy loss before 5th week of gestation with no gestational sac visible on ultrasonogram.
(Peri-Implantational Loss, NCI Thesaurus)
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