(a.) of or pertaining to an embryo; embryonal; rudimentary.

abecedarian aboriginal antenatal arrested atomic autochthonous backward basal basic beginning budding callow central coarse corpuscular creative crucial crude defective deficient elemental elementary evanescent failing fetal formative foundational fundamental generative genetic germinal germinant germinational germinative germiparous gestatory granular hypoplastic immature impalpable imperceptible imponderable in arrear in arrears in default in embryo in its infancy in ovo in short supply in the bud in the rough inadequate inappreciable inaugural inceptive inchoate inchoative incipient incomplete incunabular indiscernible infant infantile infinitesimal initial initiative initiatory intangible introductory inventive invisible lacking larval microcosmic microscopic missing molecular nascent natal needing original oversimple part partial parturient patchy postnatal pregnant prenatal primal primary prime primeval primitive primogenial primordial pristine procreative protogenic radical reductionistic reductive rough roughcast roughhewn rude rudimental rudimentary scant scanty scrappy seminal short shy simplistic sketchy stunted subatomic tenuous thin ultramicroscopic unblown uncultivated uncultured uncut underdeveloped undeveloped unfashioned unfinished unformed unhewn unlabored unlicked unpolished unprocessed unrefined unseeable untreated unworked unwrought ur wanting