coltan

noun

col·​tan ˈkōl-ˌtan 

: a dull black ore that consists of a mixture of columbite and tantalite and is a minor source of tantalum

Word History

Etymology

International Scientific Vocabulary columbo-tantalite, from columbite + -o- + tantalite

First Known Use

1999, in the meaning defined above

Rhymes for coltan

• molten