Definition of "nonluminous" []

• Not luminous. (adjective)

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• "He created the Bunsen burner for use in flame tests of various metals and salts: its nonluminous flame did not interfere with the colored flame given off by the test material."
• "Finally, near the center, something nonluminous appeared in the star field, and soon its seven-sided shape was fuzzily evident."
• "The four alien craft, still being tracked, were nonluminous dots, one in each quadrant of the screen."