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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cd4 is a noun meaning "a glycoprotein that is found primarily on the surface of helper T cells". It carries one recorded sense.
a glycoprotein that is found primarily on the surface of helper T cells
“CD4 is a receptor for HIV in humans”
Definitions, synonyms and semantic relations for cd4 come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.