cluster of differentiation 4 clusteringly • cluster of differentiation 8 · · · Info · Definitions · Synonyms · Characters · · cluster of differentiation 4 · · Text Common · · Latin · · Scripts 28 · · Length 10 · · Syllables Definitions · · · (noun) a glycoprotein that is found primarily on the surface of helper T cells. Synonyms: cluster of differentiation 4, CD4. Example: "Cd4 is a receptor for hiv in humans." · · Noun Definition 1 Synonyms · · · cd4 · · Synonym 1 Characters · · space U+0020 4 digit four U+0034 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075