extrusion(redirected from extrusions)
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1. The act or process of pushing or thrusting out.
2. The act or process of shaping by forcing through a die.
3. An object or material produced by extruding.
[Medieval Latin extrūsiō, extrūsiōn-, from Latin extrūsus, past participle of extrūdere, to thrust out; see extrude.]
1. the act or process of extruding
2. (Geological Science)
a. the movement of magma onto the surface of the earth through volcano craters and cracks in the earth's crust, forming igneous rock
b. any igneous rock formed in this way
3. (Mechanical Engineering) a component or length of material formed by the process of extruding
[C16: from Medieval Latin extrūsiō, from extrūdere to extrude]
1. the process or act of extruding.
2. something that is extruded.
[1530–40; < Medieval Latin]
The emission of lava onto the surface of the Earth. ♦ Rocks that formed from the cooling of lava are called extrusive rocks. Compare intrusion.
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|Noun||1.||extrusion - something that bulges out or is protuberant or projects from its surroundings; "the gun in his pocket made an obvious bulge"; "the hump of a camel"; "he stood on the rocky prominence"; "the occipital protuberance was well developed"; "the bony excrescence between its horns"|
excrescence, gibbosity, gibbousness, hump, jut, bulge, protrusion, protuberance, swelling, bump, prominence
frontal eminence - either prominence of the frontal bone above each orbit
occipital protuberance - prominence on the outer surface of the occipital bone
belly - a part that bulges deeply; "the belly of a sail"
caput - a headlike protuberance on an organ or structure; "the caput humeri is the head of the humerus which fits into a cavity in the scapula"
mogul - a bump on a ski slope
snag - a sharp protuberance
wart - any small rounded protuberance (as on certain plants or animals)
projection - any solid convex shape that juts out from something
|2.||extrusion - squeezing out by applying pressure; "an unexpected extrusion of toothpaste from the bottom of the tube"; "the expulsion of pus from the pimple"|