baddeleyitePronunciation: /ˈbad(ə)lɪʌɪt/Definition of baddeleyite noun [mass noun] a mineral consisting largely of zirconium dioxide, ranging from colourless to yellow, brown, or black. Origin: late 19th century: named after Joseph Baddeley, English traveller, + -ite1baddeleyite in other Oxford dictionaries Definition of baddeleyite in the US English dictionary