D defs.my
Entry 1 sense Webster, 1913

Embryonic

/ĕmˌ-brē-än'-ĭk/ · Em·bry·on·ic · IPA /ˈɛm.bɹi.ɒn.ɪk/
01 a. Of or pertaining to an embryo; embryonal; rudimentary.
  1. 1.
    Of or pertaining to an embryo; embryonal; rudimentary.(Biol.)
Phrases & compounds
Embryonic sac — the vesicle within which the embryo is developed in the ovule; -- sometimes called also amnios sac, and embryonal sac.