Source : Webster's Revised Unabridged Dictionary (1913)

Calliopsis \Cal`li*op"sis\, n. [NL., fr. Gr. pref. kalli- (fr.
   kalo`s beautiful) + 'o`psis appearance.] (Bot.)
   A popular name given to a few species of the genus
   {Coreopsis}, especially to {C. tinctoria} of Arkansas.

Source : WordNet®

calliopsis
     n : North American annual widely cultivated for its yellow
         flowers with purple-red to brownish centers; in some
         classifications placed in a subgenus Calliopsis [syn: {Coreopsis
         tinctoria}]