/ Dictionary / Index B brachistochrone: Meaning and Definition of Find definitions for: bra•chis•to•chrone Pronunciation: (bru-kis'tu-krōn"), [key] — n. Mech. the curve between two points that in the shortest time by a body moving under an external force without friction; the curve of quickest descent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. brachiosaur brachium Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language