noun
also chal·kone ˈkalˌkōn
( -s )
Etymology: German chalkon, from chalk- chalc- + -on -one; from its use in producing reddish yellow dyestuffs
: a yellow crystalline ketone C 6 H 5 CHCHCOC 6 H 5 made by the condensation of benzaldehyde and acetophenone ; also : any of various derivatives of this compound, several of which are plant pigments related to the flavones