illuminant
Americannoun
noun
adjective
Other Word Forms
- nonilluminant noun
- unilluminant adjective
Etymology
Origin of illuminant
1635–45; < Latin illūminant- (stem of illūmināns ) present participle of illūmināre to light up, brighten, equivalent to illūmin- ( see illumine) + -ant- -ant
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A fixture even more than a star, either way an illuminant.
From New York Times • Jan. 29, 2021
Kerosene was the dominant illuminant fuel for a few decades between the decline of whale oil and the rise of electricity.
From Forbes • Oct. 21, 2011
These methods entail the use of acetylene under pressure, and are so analogous to limelight that I shall for convenience deal with them in the chapter devoted to that illuminant.
From Optical Projection Part 1: Projection of Lantern Slides by Wright, Lewis
Microscope Illuminant.—In tropical and subtropical regions diffuse daylight is the best illuminant.
From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)
The most powerful search-light can in no way compare with daylight as an illuminant, and, like all other mechanical contrivances, they have certain marked drawbacks in war.
From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
