protohemin protoheme • Protohemiptera · · · Info · Definitions · Synonyms · Characters · · protohemin · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood. Synonyms: hemin. · · Noun Definition 1 Synonyms · · · hemin · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074