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diabase

play
noun di·a·base \ˈdī-ə-ˌbās\

Definition of diabase

  1. 1 archaic :  diorite

  2. 2 chiefly British :  an altered basalt

  3. 3 :  a fine-grained rock of the composition of gabbro but with an ophitic texture

diabasic play \ˌdī-ə-ˈbā-sik\ adjective


Origin of diabase

French, probably from Greek diabasis act of crossing over, from diabainein to cross over, from dia- + bainein to go — more at come


First Known Use: circa 1816


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