Webster’s Revised Unabridged Dictionary · 1913
Coreopsis
Co′re·op′sis (k?′r?-?p′s?s), n. [NL., fr. Gr. κόρις bug + ὄψις appearance.] (Bot.) A genus of herbaceous composite plants, having the achenes two-horned and remotely resembling some insect; tickseed. C. tinctoria, of the Western plains, the commonest plant of the genus, has been used in dyeing.