Andesite

//ˈæn.dɪˌsaɪt// noun

Definitions

Noun
  1. 1
    Any of a class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar. countable, uncountable
  2. 2
    a dark grey volcanic rock wordnet

Etymology

From Andes + -ite.

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