Definitions for diabaseˈdaɪ əˌbeɪs

This page provides all possible meanings and translations of the word diabase


  1. diabase(Noun)

    A fine-grained igneous rock composed mostly of pyroxene and feldspar

Webster Dictionary

  1. Diabase(noun)

    a basic, dark-colored, holocrystalline, igneous rock, consisting essentially of a triclinic feldspar and pyroxene with magnetic iron; -- often limited to rocks pretertiary in age. It includes part of what was early called greenstone

  2. Origin: [F. diabase, fr. Gr. a crossing or passing over, fr. ; + to go; -- so called by Brongniart, because it passes over to diorite.]


  1. Diabase

    Diabase or dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. In North American usage, the term diabase refers to the fresh rock, whilst elsewhere the term dolerite is used for the fresh rock and diabase refers to altered material. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled margins which may contain tachylite.

Images & Illustrations of diabase


Find a translation for the diabase definition in other languages:

Select another language:

Discuss these diabase definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:     


Use the citation below to add this definition to your bibliography:


"diabase." STANDS4 LLC, 2015. Web. 25 Nov. 2015. <>.

Are we missing a good definition for diabase? Don't keep it to yourself...

Nearby & related entries:

Alternative searches for diabase:

Thanks for your vote! We truly appreciate your support.