Roughing mill Definition & Meaning | Dictionary
noun Metallurgy. a rolling mill for converting steel ingots into blooms, billets, or slabs. Origin of roughing mill First recorded in 1840-50 Words nearby roughing mill rough fish, rough-hew, roughhouse, roughie, roughing-in, roughing mill, roughish, rough it, rough-legged buzzard, rough-legged hawk, rough lemon