The Effective Temperature (Teff or Black Body Temperature, TBB) of a body such as a star is the Temperature of a Black Body that would produce the same total radiation as the star produces. It is generally in the neighborhood of other measures of temperature. Other measures include Color Temperature, the temperature of a black body that would produce portions of the star's spectrum.
H-R Diagram (HRD)
Stellar Luminosity Determination
Stellar Parameter Determination