ex·tra·em·bry·on·ic 
(ĕk′strə-ĕm′brē-ŏnĭk)
(ĕk′strə-ĕm′brē-ŏnĭk)adj.
Of or being a structure that is outside the embryo: extraembryonic membranes.
- polycyclic aromatic hydrocarbon
- polycystic
- polycystic ovary syndrome
- polycythemia
- polydactyl
- polydactylism
- polydactyly
- polydentate
- polydipsia
- polydipsic
- polyelectrolyte
- polyembryonic
- polyembryony
- polyene
- polyester
- polyesterification
- polyestrous
- polyether
- polyethylene
- polyethylene glycol
- polygala
- polygamist
- polygamous
- polygamously
- polygamy