COLUMBITE

niobite, columbite

(noun) a black mineral that is an ore of niobium and tantalum

Source: WordNet® 3.1


Etymology

Noun

columbite (plural columbites)

(mineral) A black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum.

Source: Wiktionary


Co*lum"bite, n. Etym: [Cf. F. colombite. See Columbium.] (Min.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition



RESET




Word of the Day

26 November 2024

TRANSPOSITION

(noun) (music) playing in a different key from the key intended; moving the pitch of a piece of music upwards or downwards


coffee icon

Coffee Trivia

According to WorldAtlas, Finland is the biggest coffee consumer in the entire world. The average Finn will consume 12 kg of coffee each year.

coffee icon