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Meaning of brachistochrone

bra•chis•to•chrone

Pronunciation: (bru-kis'tu-krōn"), [key]
— n. Mech.
  1. 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.