Bible Dictionaries
Brachystochrone

Webster's Dictionary

(n.) A curve, in which a body, starting from a given point, and descending solely by the force of gravity, will reach another given point in a shorter time than it could by any other path. This curve of quickest descent, as it is sometimes called, is, in a vacuum, the same as the cycloid.

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