† quadroxiden.
Chemistry. Obsolete.
= tetroxide n.
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tritoxide1806
oxidule1815
quadroxide1825
sesquioxide1831
pentoxide1851
tetroxide1866
trioxide1868
1825 T. Thomson Attempt to Establish First Princ. Chem. I. iv. 85 The protoxide was analyzed by Davy, the tritoxide by Von Stadion, the quadroxide by Davy.
1826 J. W. Webster Man. Chem. ii. 95 (table) Quadroxide of chlorine.
1868 C. W. Eliot & F. H. Storer Man. Inorg. Chem. (ed. 2) xviii. 273 (heading) Antimoniate of antimony or quadroxide of antimony.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online September 2021).
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