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non·lu·mi·nous | \ ˌnän-ˈlü-mə-nəs 
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\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
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Time Traveler for nonluminous
The first known use of nonluminous was in 1825
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