Dictionary

diabase

noun di·a·base \ˈdī-ə-ˌbās\

Definition of DIABASE

1
archaic :  diorite
2
chiefly British :  an altered basalt
3
:  a fine-grained rock of the composition of gabbro but with an ophitic texture
di·a·ba·sic \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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