diphenylamine /daɪˌfiːnaɪləˈmiːn, -ˈæmɪn, -nɪl-, -ˌfɛn-/

• 1. 

  N a colourless insoluble crystalline derivative of benzene, used in the manufacture of dyes, as a stabilizer in plastics, etc. Formula: (C6H5)2NH 二苯胺