Chiefly Embryology = allantoic, adj.

Of or pertaining to an amnion; of the nature of, or characterized by, an amnion. Physiol.

= cotyledonary, adj.

= amniotic, adj.

Embryology. = allantoic, adj.

Of or pertaining to the chorion.

Physiology. Characterized by the presence of cotyledons (see cotyledon, n. 1).

Of or relating to the chorion.

Of or relating to the allantois; designating the allantois. Cf. earlier allantoid, adj. 1.

taking place, situated, or administered within the amnion.