ˈbȯ(ə)rt noun
( -s )
Etymology: probably from Dutch boort, perhaps from Middle French bourt bastard, from Latin burdus hinny
1. also boart or boort ˈbō(ə)rt, ˈbȯ(- : a diamond of inferior quality : a diamond not of gem quality ; collectively : material consisting of imperfectly crystallized diamonds or of fragments produced in cutting diamonds used for dressing and truing grinding wheels and in making abrasive diamond powder — called also bortz
2. : carbonado III