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Related to illuminant: illuminati


Something that gives off light.

[Latin illūmināns, illūminant-, present participle of illūmināre, to illuminate; see illuminate.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


something that provides or gives off light
giving off light; illuminating
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪˈlu mə nənt)

an illuminating agent or material.
[1635–45; < Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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.
When written without subscripts, they are assumed to have been calculated for illuminant C and the [degress] (1931) standard observer unless specified otherwise.
incandescent lamp, cold-cathode tube) in terms of illuminant efficiency, there is a need for new technology for mass production of high-quality epitaxial wafers.
The experiment was conducted under standard illuminant D65 in a Macbeth spectralight box.
It is primarily used as a smoke screen or an illuminant. (22) Based upon that use and the purpose behind the CWC, the Organisation for the Prohibition of Chemical Weapons, the treaty-implementing body of the CWC, states: Incendiary agents such as napalm and phosphorus are not considered to be C[hemical] W[eapon] agents since they achieve their effect mainly through thermal energy.
(1) L'ombre, c'est effectivement l'un des themes les plus marquants des Chants dont les pages sombres, a peine eclairees de furtifs eclairs illuminant des scenes d'une violence rare, entrainent le lecteur vers des << marecages desoles >> (Ducasse 123).
Yet his name has become an illuminant and a sanction; through him, kindliness toward Victorian architecture is permitted to thousands whose habits of mind would drive them in a quite other direction.'
Dowling, who previously served as the director of safety and security at Philadelphia University, agrees with the IESNA guideline that high-pressure sodium lamps, used at proper levels, can be a very effective illuminant.
In both of these we consider the calculation of illuminance response to CIE illuminant D65, a tabulated distribution carrying no uncertainty, for a photometer whose spectral response is a close approximation to [V.sub.[lambda]], measured at different spectral intervals and where the measured response values are uncorrelated.
For example, the title of the book, Kitab al-Luma' fi usul al-fiqh, is rendered Le Livre des Rais illuminant les fondements de la comprehension de la Loi.
Digital Arts says Xe847 simulates the color constancy of the human visual system: Up to a certain degree, the human eye perceives the color of objects as constant, even if the ambient light or the illuminant changes.
Instead, we used incandescent lights of 3630 K (275.5 MR) and filters to transform this value into 5754 K (173.8 MR), this value is very similar (2) to the one recommended by the Atlas (illuminant C)