para·ros·an·i·line .par-ə-.rō-'zan-əl-ən n a white crystalline base C19H19N3O that is the parent compound of many dyes also its red chloride used esp. as a biological stain
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para·ro·san·i·line (par″ə-ro-zanґĭ-lin) a basic dye occurring as colorless to red crystals, a triphenylmethane derivative; the chief constituent of basic fuchsin (q.v.).Medical dictionary. 2011.