nonluminous

adjective
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

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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