Function: noun
Date: 1947
: a structure (as the amnion) that derives from the fertilized ovum but does not form a part of the embryo
Function: noun
Date: 1947
: a structure (as the amnion) that derives from the fertilized ovum but does not form a part of the embryo
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012