alumina alumiferous • alumina cement · · · Info · Definitions · Synonyms · Characters · · alumina · · Text Latin · · Script 7 · · Length 4 · · Syllables Definitions · · · (noun) any of various forms of aluminum oxide occurring naturally as corundum. Synonyms: aluminum oxide, aluminium oxide. · · Noun Definition 1 Synonyms · · · aluminum oxide · · Synonym 1 aluminium oxide · · Synonym 2 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E u latin small letter u U+0075