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chromium dioxide

noun
1.
a strongly magnetic, black, semiconducting substance, CrO 2 , used as the active material in a type of recording tape.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for chromium-dioxide

chromium dioxide

noun
1.
a chemical compound used as a magnetic coating on cassette tapes; chromium(IV) oxide. Formula: CrO2 Also called (not in technical usage) chrome dioxide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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