self-luminous

adjective
self-lu·​mi·​nous | \ ˌself-ˈlü-mə-nəs How to pronounce self-luminous (audio) \

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

First Known Use of self-luminous

1751, in the meaning defined above

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The first known use of self-luminous was in 1751

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