Definition of andesite
: an extrusive usually dark grayish rock consisting essentially of oligoclase or feldspar
andesiticplay \ˌan-di-ˈzi-tik\ adjective
Recent Examples of andesite from the Web
NASA scientists said the Sojourner rover’s first close-up inspection of a Martian rock produced a surprise: the quartz-heavy object resembled andesite, a common volcanic rock found on Earth.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'andesite'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of andesite
German Andesit, from Andes
First Known Use: 1837See Words from the same year
Seen and Heard
What made you want to look up andesite? Please tell us where you read or heard it (including the quote, if possible).