extrusion

(noun) something that bulges out or is protuberant or projects from its surroundings. Synonyms: bulge, bump, hump, swelling, gibbosity, gibbousness, jut, prominence, protuberance, protrusion, excrescence. Examples: "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."

(noun) squeezing out by applying pressure. Synonyms: expulsion. Examples: "An unexpected extrusion of toothpaste from the bottom of the tube." "The expulsion of pus from the pimple."