EXAMPLES | WORD ORIGIN noun . Petrology a fine-grained gabbro occurring as minor intrusions. . British a dark igneous rock consisting essentially of augite and feldspar; an altered dolerite. Origin of diabase 1810–20;
base base 1 Related forms di·a·ba·sic, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for diabase Historical Examples of diabase
diabase and diorite appear in the Ardennes.
The minerals of
diabase are the same as those of dolerite, viz.
One, a complete specimen composed of a
diabase, was shaped by pecking followed by grinding.
In Arizona chrysotile is found in veins in cherty limestone, associated with
At St Andreasberg in the Harz it occurs both in
diabase and in the veins of silver ore. British Dictionary definitions for diabase noun British an altered dolerite Derived Forms diabasic, adjective Word Origin for diabase
C19: from French, from Greek
diabasis a crossing over, from diabainein to cross over, from dia- + bainein to go
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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A dark-gray to black, medium-grained igneous rock consisting mainly of labradorite and pyroxene. Diabase is compositionally similar to andesite, but has coarser grains. It is commonly found in sills and dikes. Also called dolerite
The American Heritage® Science Dictionary
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