ultraluminous
adjective
ul·tra·lu·mi·nous
| \ ˌəl-trə-ˈlü-mə-nəs
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Definition of ultraluminous
: 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.
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