Medical Dictionary
paraphenylenediamine
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
Seen & Heard
What made you want to look up paraphenylenediamine? Please tell us where you read or heard it (including the quote, if possible).