- luminosity class,
- luminous efficacy,
- luminous efficiency,
- luminous emittance,
- luminous energy,
- luminous exitance
Origin of luminous
Examples from the Web for non-luminous
The upper Oxidising Flame at consists of the non-luminous tip of the flame.Cooley's Practical Receipts, Volume II|Arnold Cooley
Bacterial growths which are luminous in the dark are much more active than the non-luminous bacteria hitherto tried.
Solid matter is most easily provided by burning a gas rich in dense hydrocarbons, not a poor and non-luminous gas.
It cannot, for example, absorb the luminous rays of the sun, though it can absorb the non-luminous rays of the earth.Fragments of science, V. 1-2|John Tyndall
Thus chalk dust sifted into a non-luminous flame renders it luminous.An Elementary Study of Chemistry|William McPherson
Word Origin for luminous
early 15c., "full of light," from Latin luminosus "shining, full of light," from lumen (genitive luminis) "light," related to lucere "to shine" (see light (n.)). Related: Luminously.