The Collaborative International Dictionary of English v.0.48:
opencast \opencast\ adj. same as opencut. Syn: opencut, strip(prenominal). [WordNet 1.5]WordNet (r) 3.0 (2006):
opencast adj 1: (of mines and mining) worked from the exposed surface; "opencast mining"; "an opencut iron mine" [syn: opencast, opencut]