diabases

/ˈdaɪəˌbeɪsɪz/
noun
  1. Plural form of diabase; multiple types or pieces of the dark igneous rock.
    • Different diabases vary slightly in color depending on their mineral content.
    • The construction crew ordered two truckloads of crushed diabases for the new road.
    • The museum displayed several diabases from different volcanic regions.
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