andesite

[ an-duh-zahyt ]

/ ˈæn dəˌzaɪt /

Save This Word!

noun

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

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

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 shelter, 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. 2023

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.