Bible Dictionaries
Tautochrone

Webster's Dictionary

(n.) A curved line, such that a heavy body, descending along it by the action of gravity, will always arrive at the lowest point in the same time, wherever in the curve it may begin to fall; as, an inverted cycloid with its base horizontal is a tautochrone.

Bibliography Information
Webster, Noah. Entry for 'Tautochrone'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/tautochrone.html. 1828.