Definition of black light
1 : invisible ultraviolet light
2 : a lamp that radiates black light
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Ending a Sentence with a Preposition
An old-fashioned rule we can no longer put up with.
'All Intensive Purposes' or 'All Intents and Purposes'?
We're intent on clearing it up
'Mispronunciations' That May Be Fine
'Mischievous,' 'nuclear,' and other words to pron...
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What's with his feathered cap?