Gail·lard Cut 
(gĭl-yärd, gālärd′) Formerly Cu·le·bra Cut (k-lābrə)
(gĭl-yärd, gālärd′) Formerly Cu·le·bra Cut (k-lābrə) An excavation, about 13 km (8 mi) long and averaging 14 m (45 ft) deep, through Culebra Mountain, a hill in the Canal Zone, Panama. The cut forms the southeast section of the Panama Canal.