Definition of coumarone in US English:

coumarone

noun

Chemistry
  • An organic compound present in coal tar, used to make thermoplastic resins for paints and varnishes.

    A bicyclic compound with fused benzene and furan rings; chemical formula: C₈H₆O

Origin

Late 19th century: from coumarin + -one.

Pronunciation

coumarone

/ˈko͞oməˌrōn/