- coreopsis, tickseed, tickweed, tick-weed - any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America
--1 is a kind of herb, herbaceous plant
--1 is a member of genus Coreopsis
--1 has particulars:giant coreopsis, Coreopsis gigantea; sea dahlia, Coreopsis maritima; calliopsis, Coreopsis tinctoria