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chromium dioxide

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WordReference Random House Unabridged Dictionary of American English © 2026

chro′mium diox′ide,

Chemistrya strongly magnetic, black, semiconducting substance, CrO₂, used as the active material in a type of recording tape.

Collins Concise English Dictionary © HarperCollins Publishers::

chromium dioxide n

a chemical compound used as a magnetic coating on cassette tapes; chromium(IV) oxide. Formula: CrO₂Also called (not in technical usage): chrome dioxide

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