amniotic sac

• enPR: ăm′nē-ŏt′ĭk săk′
• (Received Pronunciation) IPA^(key): (contemporary) /ˌæm.niːˌɒt.ɪk ˈsæk/, /ˌam.niːˌɒt.ɪk ˈsak/; (conservative) /ˌæm.niːˌɔːt.ɪk ˈsæk/, /ˌam.niːˌɔːt.ɪk ˈsak/

• Audio (Southern England):

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• (General American) IPA^(key): (without the cot–caught merger) /ˌæm.niˌɔt.ɪk ˈsæk/, (cot–caught merger) /ˌæm.niˌɑt.ɪk ˈsæk/
• (Canada) IPA^(key): (standard) /ˌæm.niˌɒt.ɪk ˈsæk/, (dialectal) /ˌæm.niˌɑt.ɪk ˈsæk/
• (General Australian) IPA^(key): /ˌæm.niːˌɔt.ɪk ˈsæk/
• (New Zealand) IPA^(key): /ˌɛm.niːˌɒt.ək ˈsɛk/
• (Scotland) IPA^(key): /ˌam.niˌɔt.ɪk ˈsak/
• (India) IPA^(key): /ˌa(ː)m.niːˌɔʈ.ɪk ˈsa(ː)k/
• Hyphenation: am‧ni‧ot‧ic sac

amniotic sac (plural amniotic sacs)

2. (anatomy) The sac in which the foetus develops in mammals, reptiles, and birds.

   Synonyms: (now chiefly informal) bag of waters, (informal) membranes

   Near-synonym: amnion (meronymy, holonymy, or embryological sequence seem to vary by who is defining the two)

   Hypernyms: sac, bag < structure

   Meronym: amniotic fluid

• “amniotic sac”, in OneLook Dictionary Search.