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nonluminous

adjective non·lu·mi·nous \ ˌnän-ˈlü-mə-nəs \

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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