Crossword puzzle clue "embryo's nutrition source"

a kind of beer, made without using hops as a flavouring, also YILL

the fruit of the oak tree

(Latin) the white of an egg

AMNION, (Greek) the innermost membrane enveloping the embryo of reptiles, birds and mammals

relating to an amniote, a vertebrate that develops an amnion during the embryonic stage

the protoplasmic part of an ovum, distinguished from the yolk