1. amniotic sac

noun. Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals).
Synonyms
fetal membrane amnion amnios amniote sac
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2. amniotic

adjective. (ˈæmniːɔtɪk) Of or related to the amnion or characterized by developing an amnion.
Synonyms
amnionic amnic

3. Sac

noun. A member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay.
Synonyms
Sauk Algonquin Algonquian

4. sac

noun. (ˈsæk) A case or sheath especially a pollen sac or moss capsule.
Synonyms
covering natural covering theca cover
Antonyms
hire artifact unmask uncover undress
Etymology
sac (English)
sac (French)
saccus (Latin)
σάκκος (Ancient Greek (to 1453))

5. sac

noun. (ˈsæk) A structure resembling a bag in an animal.
Synonyms
vesica cyst chorion yolk sac cavum vesicle sacculus alveolus amnion bursa pouch swim bladder amnios pocket amniotic sac float pericardial sac cisterna air bladder coelenteron saccule air cell air sac vesicula umbilicus cistern bodily cavity cavity umbilical vesicle acinus bladder vitelline sac
Antonyms
give natural object stay in place sink roughen
Etymology
sac (English)
sac (French)
saccus (Latin)
σάκκος (Ancient Greek (to 1453))

6. sac

noun. (ˈsæk) An enclosed space.
Synonyms
cavity pouch enclosed space sack pocket
Antonyms
exclude arise show fall short of
Etymology
sac (English)
sac (French)
saccus (Latin)
σάκκος (Ancient Greek (to 1453))
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