lu·mi·nos·i·ty 
(l′mə-nŏsĭ-tē)
(l′mə-nŏsĭ-tē)n. pl. lu·mi·nos·i·ties
1. The condition or quality of being luminous.
2. Something luminous.
3. The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength. Also called luminosity factor.
- extralegal
- extralegally
- extramarital
- extramundane
- extramural
- extraneous
- extraneously
- extraneousness
- extranet
- extranuclear
- extraocular muscle
- extraordinaire
- extraordinarily
- extraordinary
- extrapolate
- extrapolation
- extrapolative
- extrapolator
- extrapyramidal
- extrasensory
- extrasensory perception
- extrasolar
- extrasystole
- extrasystolic
- extraterrestrial