Hypertext Webster Gateway: "diorite"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Diorite \Di"o*rite\, n. [Cf. F. diorite. See {Diorism}.] (Min.)
An igneous, crystalline in structure, consisting essentially
of a triclinic feldspar and hornblende. It includes part of
what was called greenstone.
From WordNet (r) 1.7 (wn)
diorite
n : a granular crystalline intrusive rock
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