| columbite | [โคลัมไบต์] (n) แร่โคลัมไบต์ (สินแร่ชนิดหนึ่งของธาตุแทนทาลัมในธรรมชาติ) |
| Columbite | n. [ Cf. F. colombite. See Columbium. ] (Min.) A mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England. [ 1913 Webster ] |
| columbite-tantalite | (n) a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips, Syn. coltan |