unluminiferous

lu·mi·nif·er·ous

[loo-muh-nif-er-uhs]
adjective
producing light: the luminiferous properties of a gas.

Origin:
1795–1805; < Latin lūmin- (see lumen) + -i- + -ferous

un·lu·mi·nif·er·ous, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Medical Dictionary

luminiferous lu·mi·nif·er·ous (l&oomacr;'mə-nĭf'ər-əs)
adj.
Generating, yielding, or transmitting light.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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00:10
Unluminiferous is always a great word to know.
So is interrobang. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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