The Collaborative International Dictionary of English v.0.48:
nonmetamorphic \nonmetamorphic\ adj. 1. not metamorphic. Opposite of metamorphic. [Narrower terms: ametabolic metamorphosis)] [WordNet 1.5] 2. (Geol.) not produced by metamorphosis. metamorphic [WordNet 1.5]WordNet (r) 3.0 (2006):
nonmetamorphic adj 1: not metamorphic [ant: metamorphic]