hypabyssal
hyp·abys·sal
adj \ˌhi-pə-ˈbi-səl, ˌhī-\Definition of HYPABYSSAL
: of or relating to a fine-grained igneous rock usually formed at a moderate distance below the surface
— hyp·abys·sal·ly \-sə-lē\ adverb
Origin of HYPABYSSAL
International Scientific Vocabulary
First Known Use: 1895
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