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.]
- thermogenic
- thermogram
- thermograph
- thermographic
- thermographically
- thermography
- thermohaline
- thermojunction
- thermokarst
- thermolabile
- thermolability
- thermoluminescence
- thermoluminescent
- thermolysis
- thermolytic
- thermometer
- thermometric
- thermometry
- thermomotor
- thermonuclear
- thermoperiodicity
- thermoperiodism
- thermophile
- thermophilic
- thermopile