diabase


di·a·base

noun \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

diabase

noun    (Concise Encyclopedia)

Fine- to medium-grained, dark gray to black intrusive igneous rock. Diabase is one of the dark rocks known commercially as “black granite.” It is extremely hard and tough and is commonly quarried for crushed stone, under the name “trap.” Chemically and mineralogically, diabase closely resembles the volcanic rock basalt, but it is generally somewhat coarser grained.

Variants of DIABASE

diabase or dolerite

Browse

Next Word in the Dictionary: diabatic
Previous Word in the Dictionary: diabantite
All Words Near: diabase

Seen & Heard

What made you want to look up diabase? Please tell us where you read or heard it (including the quote, if possible).