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Pronunciation: tap


  1. To withdraw fluid from a cavity by means of a trocar and cannula, hollow needle, or catheter.
  2. To strike lightly with the finger or a hammerlike instrument in percussion or to elicit a tendon reflex.
  3. A light blow.
  4. An East Indian fever of undetermined nature.
  5. An instrument to cut threads in a hole in bone before inserting a screw.

[M.E. tappe, fr. A.S. taeppa]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.