a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [ 1913 Webster ]
Embryonic sacor Embryonic vesicle (Bot.), the vesicle within which the embryo is developed in the ovule; -- sometimes called also amnios sac, and embryonal sac. [ 1913 Webster ]
(adj) in an early stage of development, Syn. embryotic, Example:the embryonic government staffed by survivors of the massacre; an embryonic nation, not yet self-governing