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Use "extrusions" in a sentence
"The creature's surface was fairly rigid and immovable in a sense but at least its walking 'extrusions' might be able to capture and eventually absorb the men, given enough time."
"Reminded you of slimy excrescences and extrusions."
"Then the building steps back, and two flat extrusions, like darker outcroppings of the monolith beneath, begin to rise, breaking off at different points before the building tops out."