Skip to Content


Pronunciation: kros'sek'shun


  1. A transverse section through a structure.
  2. A planar section through a structure in any plane; a two-dimensional slice through an anatomic structure.
  3. The probability of an activation (q.v., sense 5) by a nuclear reaction when a material is bombarded by neutrons, as in the production of radionuclides in a pile; unit: barn (10-24 cm2/atom).

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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