Dermacentor variabilis, a tick that carries bacteria responsible for several diseases in humans.

plural of wood tick

A small, immature tick larva.

(sometimes methaphorical) To sign with a tick. / To list (create or recite a list). / (Canada, US, transitive) To annoy, aggravate. / (Britain, Australia, transitive) To reprimand.

(baseball, slang, rare) A foul ball which just brushes by the bat, making a ticking sound.

(intransitive, of an engine) to idle (to run at a slow speed, or out of gear). / (idiomatic, of, e.g. a process or a business) To run smoothly and without problems.

Any of several plants, of the genus Bidens, having yellow flowers and prickly fruit. / The barbed fruit of these plants, which sticks to clothing and to animal fur.

plural of tick mark

(intransitive or transitive, of events, time or time-keeping devices) To continue over time.

Third-person singular simple present indicative form of tick and tie