non·​lu·​mi·​nous | \ ˌnän-ˈlü-mə-nəs How to pronounce nonluminous (audio) \

Definition of nonluminous

: not emitting light : not luminous The results also suggest this galaxy contains a substantial amount of nonluminous matter.— I. Peterson a nonluminous celestial body

Examples of nonluminous in a Sentence

Recent Examples on the Web All this points to the existence of a great, nonluminous, unseen mass. Ryan Bradley, Popular Science, "Glimpse the gold mine where scientists are searching for dark matter," 27 Oct. 2020 Ninety-five percent of all stuff takes mysterious, nonluminous forms dubbed dark matter and dark energy, which betray their presence in the cosmos by attracting and repulsing, respectively, the 5 percent of stuff that’s visible. Quanta Magazine, "An Astrophysicist Who Maps the Universe’s Terra Incognita," 4 Feb. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nonluminous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of nonluminous

1825, in the meaning defined above

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The first known use of nonluminous was in 1825

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Cite this Entry

“Nonluminous.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2021.

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