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protoxide |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Protoxide \Pro*tox"ide\, n. [Proto- + oxide: cf F. protoxide.] (Chem.) That one of a series of oxides having the lowest proportion of oxygen. See {Proto-}, 2 b . {protoxide of nitrogen}, laughing gas, now called {hyponitrous oxide}
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