holmium holmic • holmos · · · Info · Definitions · Synonyms · Characters · · holmium · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds. Synonyms: Ho, atomic number 67. · · Noun Definition 1 Synonyms · · · ho · · Synonym 1 atomic number 67 · · Synonym 2 Characters · · h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F u latin small letter u U+0075