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Use "involutions" in a sentence
"Its white surface is marbled with faint purple involutions the edges of which are etched with fine black lines."
"Above, illuminated by a bizarre reddish glow, changing surface tensions draw themselves as involutions in the flesh of the sky."
"Women's bodies contain so many curves, contours, knurls, crannies, convexities, involutions and promontories that their clothing provides space-age telemetry at every square inch, constantly sending back warning signals to the brain."