diorite Meaning, Definition & Usage

  1. noun a granular crystalline intrusive rock

WordNet

Di"o*rite noun
Etymology
Cf. F. diorite. See Diorism.
Definitions
  1. (Min.) An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone.

Webster 1913