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protoxide

[proh-tok-sahyd, -sid] /proʊˈtɒk saɪd, -sɪd/
noun, Chemistry
1.
the one of a series of oxides having the smallest proportion of oxygen.
Also, protoxid
[proh-tok-sid] /proʊˈtɒk sɪd/ (Show IPA)
.
Origin
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for protoxide

protoxide

/prəʊˈtɒksaɪd/
noun
1.
the oxide of an element that contains the smallest amount of oxygen of any of its oxides
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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