gibbsite gibbousness • gibbus · · · Info · Definitions · Characters · · gibbsite · · Text Latin · · Script 8 · · Length Definitions · · · (noun) white crystalline mineral consisting of aluminum hydroxide; a constituent of bauxite and a source of alumina. · · Noun Definition 1 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 s latin small letter s U+0073 t latin small letter t U+0074