| a. | 1. | (Biol.) Pertaining to an embryo, or the initial state of any organ; embryonic. |
| Adj. | 1. | embryonal - of or relating to an embryo; "the embryonic membrane" Synonyms: embryonic |
| 2. | embryonal - of an organism prior to birth or hatching; "in the embryonic stage"; "embryologic development" Synonyms: embryologic, embryonic |