ultraluminous
adjective
ul·tra·lu·mi·nous
ˌəl-trə-ˈlü-mə-nəs 
: emitting an extremely large amount of electromagnetic radiation (such as light, X-rays, or infrared radiation) : extremely luminous
an ultraluminous infrared galaxy
We review the likely population, observational properties, and broad implications of stellar-mass black holes and ultraluminous x-ray sources.—
Rob Fender et al.
Rob Fender et al.Examples of ultraluminous in a Sentence
Recent Examples on the Web
Even rarer and more spectacular are ultraluminous infrared galaxies, or ULIRGs.
—Aaron S. Evans, Scientific American, 1 Dec. 2021
These are ULXs, or ultraluminous X-ray sources.
—Alison Klesman, Discover Magazine, 21 Feb. 2017
Aaron S. Evans, Scientific American, 1 Dec. 2021
These are ULXs, or ultraluminous X-ray sources.
—Alison Klesman, Discover Magazine, 21 Feb. 2017
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultraluminous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Ultraluminous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraluminous. Accessed 24 Apr. 2024.
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