The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various plants of the genus Coreopsis in the composite family, especially the North American species, having showy radiate flower heads with yellow or, rarely, purplish flowers. Also called tickseed.
n. Any of several composite herbs, of genus Coreopsis, typically with bright yellow flowers.
Word Usage
"The snake-head, Chelone glabra, grew close to the shore, while a kind of coreopsis, turning its brazen face to the sun, full and rank, and a tall dull red flower, Eupatorium purpureum, or trumpet-weed, formed the rear rank of the fluvial array."