Of, relating to, or being an embryo.
also em·bry·ot·ic (-ŏt'ĭk) Rudimentary; incipient: an embryonic nation, not yet self-governing.
embryonic em·bry·on·ic (ěm'brē-ŏn'ĭk) or em·bry·on·al (ěm'brē-ə-nəl) adj. Of, relating to, or being an embryo.