Answer: evolute

AnswerCrossword Clue
EVOLUTECurvature locus
EVOLUTEGeometrical locus
EVOLUTEUnfolded.
EVOLUTEGeometrical curve.
EVOLUTETurned back.
EVOLUTEUnfolded, as petals.
EVOLUTEGo from ape to man.
EVOLUTEGeometric curve.
EVOLUTEDevelop
EVOLUTEUnfolded
EVOLUTEGeometric curvature center
evoluteto develop by evolution
evolutethe locus of the centers of curvature of, or the envelope of the normals to, another curve