The Collaborative International Dictionary
Melaphyre
Melaphyre \Mel"a*phyre\, n. [F., fr. Gr. me`las, me`lanos, black + porphyre porphyry.] (Min.) Any one of several dark-colored augitic, eruptive rocks allied to basalt.
Wiktionary
melaphyre
n. (context mineralogy English) Any of several dark augitic eruptive rocks allied to basalt.