TICK, n. Credit; trust; as, to buy upon tick.
TICK, n. A little animal of a livid color and globose-ovate form, that infests sheep,dogs, goats, cows, &c., a species of Acarus.
TICK, n. [L. tego; Eng. to deck.] The cover or case of a bed, which contains the feathers, wool or other material.
TICK, v.i. [from tick, credit.] To run upon score.
TICK, v.i. [L. tango, tago.] To beat; to pat; or to make a small noise by beating or otherwise; as a watch.