/feuh nan'threen kweuh nohn", -kwin"ohn/ , n. Chem.
a yellowish-orange, crystalline, water-insoluble solid, C 14 H 8 O 2 , used chiefly in organic synthesis and the manufacture of dyes.
Also, phenanthraquinone /feuh nan'threuh kweuh nohn", -kwin"ohn/ .
[ 1880-85; PHENANTHRENE + QUIN(INE) + -ONE ]