[bruh-kis-tuh-krohn] 
| 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. |
[bruh-kis-tuh-kron-ik] , bra⋅chis⋅toch⋅ro⋅nous [brey-kuh-stok-ruh-nuh
s, brak-uh-] , adjective