Ticks are small arachnids in the order Ixodida. Along with mites, they constitute the subclass Acarina. Ticks are ectoparasites, living by hematophagy on the blood of mammals, birds, and sometimes reptiles and amphibians. Ticks are vectors of a number of diseases, including Lyme disease, Q fever, Colorado tick fever, Rocky Mountain spotted fever, African tick bite fever, tularemia, tick-borne relapsing fever, babesiosis, ehrlichiosis, Tick paralysis, and tick-borne meningoencephalitis, as well as bovine anaplasmosis.

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  1. A tiny woodland arthropod of the order Acarina.

Noun (etymology 2)

  1. A relatively quiet but sharp sound generally made repeatedly by moving machinery.
    The steady tick of the clock provided a comforting background for the conversation.
  2. A mark on any scale of measurement; a unit of measurement.
    At midday, the long bond is up a tick.
  3. A jiffy (unit of time defined by basic timer frequency).
  4. A short period of time, particularly a second.
    I'll be back in a tick.
  5. a mark () made to indicate agreement, correctness or acknowledgement; checkmark
    Indicate that you are willing to receive marketing material by putting a tick in the box

Noun (etymology 3)

  1. Ticking.
  2. A sheet that wraps around a mattress; the cover of a mattress, containing the filling.

Noun (etymology 4)

  1. Credit, trust.


  1. To make a clicking noise similar to the movement of the hands in an analog clock.
  2. To make a tick mark.
  3. To work or operate, especially mechanically.
    He took the computer apart to see how it ticked.
    I wonder what makes her tick.
  4. To strike gently; to pat.

Verb (etymology 2)

  1. To go on trust, or credit.
  2. To give tick; to trust.

The above text is a snippet from Wiktionary: tick
and as such is available under the Creative Commons Attribution/Share-Alike License.

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