Medical Dictionary
paraphenylenediamine
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noun
para·phen·yl·ene·di·amine
\-ˌfen-əl-ˌēn-ˈdī-ə-ˌmēn\
Medical Definition of paraphenylenediamine
: the para isomer of phenylenediamine that is used especially in dyeing hair and sometimes causes an allergic reaction
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