Library / English Dictionary

AMNIOTIC SAC

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)

Synonyms:

amnion; amnios; amniotic sac

Classified under:

Nouns denoting animals

Hypernyms ("amniotic sac" is a kind of...):

sac (a structure resembling a bag in an animal)

Domain category:

mammal; mammalian (any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk)

Holonyms ("amniotic sac" is a part of...):

amniote (any member of the Amniota)

fetal membrane (any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus)

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