| prop. n. | 1. | (Bot.) A genus of herbaceous composite plants, having the achenes two-horned and remotely resembling some insect; tickseed. Coreopsis tinctoria, of the Western plains, the commonest plant of the genus, has been used in dyeing. |
| Noun | 1. | coreopsis - any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America |