spinel spined • spineless · · · Info · Definitions · Characters · · spinel · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones. · · Noun Definition 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070 s latin small letter s U+0073