extrusive

adjective

ex·​tru·​sive ik-ˈstrü-siv How to pronounce extrusive (audio)
-ziv
: relating to or formed by geologic extrusion from the earth in a molten state or as volcanic ash

Word History

First Known Use

1816, in the meaning defined above

Time Traveler
The first known use of extrusive was in 1816

Dictionary Entries Near extrusive

extrusion

extrusive

extuberance

See More Nearby Entries 

Cite this Entry

“Extrusive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extrusive. Accessed 21 Nov. 2024.

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Kids Definition

extrusive

adjective
ex·​tru·​sive ik-ˈstrü-siv How to pronounce extrusive (audio)
-ziv
: relating to or formed by geological extrusion from the earth in a melted state or as volcanic ash
extrusive rock
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