noun
-
the act or process of extruding
-
-
the movement of magma onto the surface of the earth through volcano craters and cracks in the earth's crust, forming igneous rock
-
any igneous rock formed in this way
-
-
a component or length of material formed by the process of extruding
-
The emission of lava onto the surface of the Earth.
-
◆ Rocks that form from the cooling of lava are generally fine-grained (because they cool quickly, before large crystals can grow) and are called extrusive rocks.
-
Compare intrusion
-
The process of making a shaped object, such as a rod or tube, by forcing a material into a mold.
Other Word Forms
Etymology
Origin of extrusion
1530–40; < Medieval Latin extrūsiōn- (stem of extrūsiō ), equivalent to Latin extrūs ( us ) (past participle of extrūdere to extrude ) + -iōn- -ion
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“We’ve become disadvantaged pretty significantly,” said Jeff Lehman, North America president for Norsk Hydro’s aluminum extrusion business.
From The Wall Street Journal • Apr. 2, 2026
Right now, the most popular processing method is extrusion.
From Salon • Nov. 25, 2024
Dekker provided the first demonstration of this loop extrusion predicted by Mirny, collaborated on synthetic cells with Schwille, and developed new ways to use nanopores—holes or membranes of nanometer size—to sequence DNA and proteins.
From Science Magazine • Jun. 6, 2024
The extrusion rate started high and decreased exponentially to very little.
From Slate • Dec. 20, 2023
The index-finger cavity is central and is seen on the upper side by a very slight rectangular perforation, which, however, does not admit the extrusion of any part of the index-finger.
From Throwing-sticks in the National Museum Third Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1883-'84, Government Printing Office, Washington, 1890, pages 279-289 by Mason, Otis T.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
