AMNIOTIC SAC

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 Dictionary entry overview: What does amniotic sac mean? 

• AMNIOTIC SAC (noun)
  The noun AMNIOTIC SAC has 1 sense:

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

  Familiarity information: AMNIOTIC SAC used as a noun is very rare.

 Dictionary entry details 

• AMNIOTIC SAC (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting animals

Synonyms:

amnion; amnios; amniotic sac

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)

 Context examples 

An external intervention during labor and delivery to break the bag of membranes or the amniotic sac to facilitate childbirth.

(Artificial Rupture of Membrane, NCI Thesaurus)

Inhalation of fluid from the amniotic sac into the lungs by the neonate.

(Neonatal Aspiration of Amniotic Fluid, NCI Thesaurus)

A pregnancy involving two fetuses that share both the chorion and amniotic sac.

(Monochorionic Monoamniotic Twin Pregnancy, NCI Thesaurus)

A pregnancy involving two fetuses that share the same chorion but have separate amniotic sacs.

(Monochorionic Diamniotic Twin Pregnancy, NCI Thesaurus)

A pregnancy involving two fetuses that each have separate chorions and amniotic sacs.

(Dichorionic Diamniotic Twin Pregnancy, NCI Thesaurus)

A lower than normal quantity of amniotic fluid in the amniotic sac as compared to normal values.

(Oligohydramnios, NCI Thesaurus)