Enter a clue or pattern or both:
The Clue
Embryonic sac (6 letter answer)
The Answer
AMNION
Tags
Notes
The answer AMNION is rarely seen, appearing only about once every 2400 puzzles.
Related Clues
Embryonic membrane
Protective membrane
Definition
AMNION as a noun:
1. (amnion, amniotic sac, amnios) = thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)