fla·va·none 
(flāvə-nōn′)
(flāvə-nōn′)n.
1. A colorless crystalline tricyclic compound, C15H12O2.
2. Any of various colorless to pale yellow derivatives of this compound, found especially in citrus fruits, and often occurring as glycosides.
[FLAV(O)- + -AN(E) + -ONE.]