Search Result for "amnios": 
Wordnet 3.0

NOUN (1)

1. thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals);
[syn: amnion, amniotic sac, amnios]



The Collaborative International Dictionary of English v.0.48:

Amnios \Am"ni*os\, n.
   Same as Amnion.
   [1913 Webster]


WordNet (r) 3.0 (2006):

amnios
    n 1: thin innermost membranous sac enclosing the developing
         embryo of higher vertebrates (reptiles, birds and mammals)
         [syn: amnion, amniotic sac, amnios]