Library / English Dictionary

    COLUMBITE

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    A black mineral that is an ore of niobium and tantalumplay

    Synonyms:

    columbite; niobite

    Classified under:

    Nouns denoting substances

    Hypernyms ("columbite" is a kind of...):

    mineral (solid homogeneous inorganic substances occurring in nature having a definite chemical composition)

    Meronyms (substance of "columbite"):

    atomic number 41; Nb; niobium (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium)

    atomic number 73; Ta; tantalum (a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite)

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