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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Luminous \Lu"mi*nous\, adjective [L. luminosus, fr. lumen light: cf. F. lumineux. See {Luminary}, {Illuminate}.]
1. Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous color.
Fire burneth wood, making it . . . luminous. --Bacon.
The mountains lift . . . their lofty and luminous heads. --Longfellow.
2. Illuminated; full of light; bright; as, many candles made the room luminous.
Up the staircase moved a luminous space in the darkness. --Longfellow.
3. Enlightened; intelligent; also, clear; intelligible; as, a luminous mind. '' Luminous eloquence.'' --Macaulay. '' A luminous statement.'' --Brougham.
{Luminous paint}, a paint made up with some phosphorescent substance, as sulphide of calcium, which after exposure to a strong light is luminous in the dark for a time.
Syn: Lucid; clear; shining; perspicuous. -- {Lu"mi*nous*ly}, adverb -- {Lu"mi*nous*ness}, noun
From The Collaborative International Dictionary of English v.0.44 [gcide]:
luminousness \lu"mi*nous*ness\ n. the quality of being luminous; emitting or reflecting light.
Syn: luminosity, luminance, light. [WordNet 1.5]
From WordNet (r) 2.0 [wn]:
luminousness
noun: the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: {luminosity}, {brightness}, {brightness level}, {luminance}, {light}]
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