co·lum·bite 
(kə-lŭmbīt′)
(kə-lŭmbīt′)n.
A black, red-brown, or colorless mineral, essentially (Fe, Mn)(Nb, Ta)2O6, the principal ore of niobium.
[COLUMB(IUM) + -ITE1.]
- winding-sheet
- wind instrument
- windjammer
- windjamming
- windlass
- windlestraw
- windmill
- window
- window box
- window-dresser
- window-dressing
- window dressing
- window envelope
- windowpane
- Windows
- window seat
- window shade
- window-shop
- window-shopper
- windowsill
- windpipe
- windproof
- Wind River
- Wind River Shoshone
- wind rose