A binoxide is an archaic term for a dioxide, an oxide containing two oxygen atoms in each molecule.
An oxide containing two atoms of oxygen in each molecule; binoxide., An oxide containing but one atom or equivalent of oxygen to two of a metal; a suboxide.
The prefix 'bi' generally means two or twice. Words that have the prefix 'bi' are:bicoastalbiannualbiannuallybiasbiasedbiasesbiasingbiathlonbiathlonsbicameralbicameralismbicarbbicarbonatebicarbonatesbicarbsbicentenariesbicentenarybicentennialbicentennialsbicepbicepsbicolorbiconcavebiconvexbicuspidbicuspidsbicyclebicycledbicyclerbicyclersbicyclesbicyclingbicyclistbicyclistsbidirectionalbidirectionallybiennialbienniallybiennialsbienniumbienniumsbifocalbifocalsbifunctionalbifurcatebifurcatedbifurcatesbifurcatingbifurcationbifurcationsbilabialbilabialsbilateralbilaterallybilinearbilingualbilingualismbilinguallybilingualsbimetallicbimetallicsbimetallismbimodalbimonthliesbimonthlybinariesbinarybinocularbinocularsbinodalbinomialbionicbionicallybionicsbiopicbiopicsbiopsiedbiopsiesbiopsybipartisanbipartisanshipbipartitebipedbipedalbipedalismbipedsbiplanebiplanesbipodbipolarbipolaritybiracialbisectbisectedbisectingbisectionbisectionsbisectorbisectorsbisectsbisexualbisexualitybisexuallybisexualsbitonalbivalentbivalvebivalvesbiweeklybiyearlybipartisan, bilateral, biracial, bisexual, biped, bicycle, binoculars