self-lu·mi·nous
| \ ˌself-ˈlü-mə-nəs
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Definition of self-luminous
: generating and emitting its own visible light
… Venus … is not self-luminous but lit by the sun …— Derek J. deSolla Price Radium paint is actually self-luminous—when freshly applied, it requires no external energy source …— Jack Forster
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“Self-luminous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/self-luminous. Accessed 12 Jun. 2021.
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The first known use of self-luminous was in 1751
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