andesite

[ an-duh-zahyt ]

/ ˈæn dəˌzaɪt /

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noun

a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite.

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Origin of andesite

1840–50; named after Andes; see -ite¹

OTHER WORDS FROM andesite

an·de·sit·ic

[an-duh-zit-ik], /ˌæn dəˈzɪt ɪk/, adjective

Words nearby andesite

Anderson splint, Andersonville, Anderssen, Andes, andesine, andesite, Andes lightning, and how!, Andhra Pradesh, andiamo, Andie

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use andesite in a sentence

In the same flow hypersthene-andesite may occur in one portion, while in close proximity the lava is an augite-andesite.
Mount Rainier|Various
It also surrounds olivine in this same rock, which is a hypersthene-andesite, the hornblende and olivine being only accessory.
Mount Rainier|Various
On Crater Peak, and below on Gibraltar, hypersthene andesite occurs with considerable variation of color and texture.
Mount Rainier|Various
The rocks thus extruded are mainly composed of dark, heavy basic material, such as basalt and andesite.
North America|Israel C. Russell

In the Breidden district are the barren Criggeon shales with ashes and flows of andesite.
Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3|Various

British Dictionary definitions for andesite

andesite

/ (ˈændɪˌzaɪt) /

noun

a fine-grained tan or grey volcanic rock consisting of plagioclase feldspar, esp andesine, amphibole, and pyroxene

Word Origin for andesite

C19: from Andes + -ite 1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for andesite

andesite

[ ăn′dĭ-zīt′ ]

A gray, fine-grained volcanic rock. Andesite consists mainly of sodium-rich plagioclase feldspar and one or more mafic minerals such as biotite, hornblende, or pyroxene. It often contains small, visible crystals (phenocrysts) of plagioclase.