1. [noun] A seed or fruit resembling a tick in shape.
2. [noun] Bidens, beggartick.
3. [noun] Coreopsis, coreopsis
4. [noun] Corispermum, goosefoots
5. [noun] Desmodium, tick-trefoil
6. [noun] Any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America.