Bible Dictionaries
Evolute

Webster's Dictionary

(n.) A curve from which another curve, called the involute or evolvent, is described by the end of a thread gradually wound upon the former, or unwound from it. See Involute. It is the locus of the centers of all the circles which are osculatory to the given curve or evolvent.

Bibliography Information
Webster, Noah. Entry for 'Evolute'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​e/evolute.html. 1828.