13. (n.)tick any of numerous bloodsucking arachnids of the order Acarina, related to but larger than mites, having a barbed proboscis for attachment to the skin: some are disease vectors.
14. (n.)tick the clothcase of a mattress, pillow, etc., containing hair, feathers, or the like.
Etymology: (1425–75; late ME tikke, teke, tyke; cf. MD, MLG tēke, OHG ziahha, ziecha tick, pillowcase)
Definition of 'tick'
Princeton's WordNet
1. (noun)tick, ticking a metallictappingsound "he counted the ticks of the clock"
2. (noun)tick any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals
3. (noun)check mark, check, tick a mark indicating that something has been noted or completed etc. "as he called the role he put a check mark by each student's name"
5. (verb)click, tick make a clicking or tickingsound "The clock ticked away"
6. (verb)tick, ticktock, ticktack, beat make a soundlike a clock or a timer "the clocks were ticking"; "the grandfather clock beat midnight"
7. (verb)tick, retick sew "tick a mattress"
8. (verb)check, check off, mark, mark off, tick off, tick put a checkmark on or near or next to "Please check each name on the list"; "tick off the items"; "mark off the units"
1. (noun)tick credit; trust; as, to buy on, or upon, tick
2. (noun)tick any one of numerous species of large parasitic mites which attach themselves to, and suck the blood of, cattle, dogs, and many other animals. When filled with blood they become ovate, much swollen, and usually livid red in color. Some of the species often attach themselves to the humanbody. The young are active and have at first but six legs
3. (noun)tick any one of several species of dipterous insects having a flattened and usually wingless body, as the bird ticks (see under Bird) and sheeptick (see under Sheep)
4. (noun)tick the cover, or case, of a bed, mattress, etc., which contains the straw, feathers, hair, or other filling