Skip to Content
Medical Term:


Pronunciation: si'ko-nok'shus


  1. Having an unfavorable effect on the emotional life and reactions mediated by higher levels of the central nervous system; may be endogenous or exogenous.
  2. Denoting people who or situations that elicit fear, pain, anxiety, or anger.

[psycho- + L. noxius, harmful]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.