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Something that gives off light.

[Latin illūmināns, illūminant-, present participle of illūmināre, to illuminate; see illuminate.]


something that provides or gives off light
giving off light; illuminating


(ɪˈlu mə nənt)

an illuminating agent or material.
[1635–45; < Latin]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.illuminant - something that can serve as a source of light
fuel - a substance that can be consumed to produce energy; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft"
References in classic literature ?
And now a large part of the American people must begin to enrich the Rockefellers as soon as the sun goes down, no matter what form of illuminant they use.
OptoClone is the worldwide trademarked name introduced by HiH for a Denisyuk colour hologram recorded with a minimum of three red, green, blue (RGB) lasers and displayed using appropriately optimised illuminants, currently RGB-LED (light emitting diodes) lights, in special display arrangements.
The real challenge is to simulate natural daylight which is defined by CIE D65 and D75 illuminants.
Whether halogen technology, xenon light, or LEDs, they all have one thing in common: The illuminants need a surrounding material that targets their light on to the road.
It made me think how foolish I had been to pay 25 cents to see some sputtering illuminants.
They are collected under three different illuminants ("horizon", "inca", and "t184") and nine different rotation angles (0[degrees] ,5[degrees] ,10[degrees] ,15[degrees] , 30[degrees] ,45[degrees] ,60[degrees] ,75[degrees] and 90[degrees] ).
CIE S005/E-1998, CIE standard Illuminants for Colourimetry (1998).
performed a comparison between using different color spaces in color transfer techniques (see Figure 6) and came to the conclusion that color spaces L[alpha][beta] and CIE LAB (with illuminants E) perform the best.
Among his topics are optics for color stimulus, the perceptual phenomenology of light and color, color and light-matter interaction, light sources and illuminants for colorimetry, Commission Internationale de l'[ETH]clairage (CIE) standard psychophysical observers and systems, instruments and colorimetric computation, color-order systems and atlases, and software developed by Gabriele Simone.
The decorative coatings industry has followed recommended guidelines for many decades, producing color-matches that are acceptable under a series of standard illuminants (D65, CWF, A) which are representative of the lamp lights in most common facilities.
Illuminants were held by metal brackets and hinges; power was supplied through corrugated tubes from a home-improvement store, a coolly offhand choice of material.
For a further characterization of illuminants and light sources, the light colour of fluorescent lamps is compared to the light colour and illuminance of light bulbs.