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Webster 1913 Edition
Andesite
An′des-ite
,Noun.
(Min.)
An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene.
Definition 2024
andesite
andesite
See also: andésite
English
Noun
andesite (plural andesites)
- (geology) A class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar.