Tick

1. n. Ticking. See Ticking, n.
2. n. Credit; trust; as, to buy on, or upon, tick.
3. v. i. To go on trust, or credit.
4. v. i. To give tick; to trust.
5. n. 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 human body. The young are active and have at first but six legs.
6. n. Any one of several species of dipterous insects having a flattened and usually wingless body, as the bird ticks (see under Bird) and sheep tick (see under Sheep).
7. n. The cover, or case, of a bed, mattress, etc., which contains the straw, feathers, hair, or other filling.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.