hy·pid·i·o·mor·phic \hī|pidēō|mȯrfik\adjective Etymology: International Scientific Vocabulary hypo- + idiomorphic : partly idiomorphic — used of a rock only some of whose constituents have a distinct crystalline form • hy·pid·i·o·mor·phi·cal·ly\-fə̇k(ə)lē\adverb