Skip to Content
Medical Term:


Pronunciation: kī


  1. The 22nd letter of the Greek alphabet, χ.
  2. In chemistry, denotes the 22nd in a series.
  3. Symbol for the dihedral angle between the α-carbon and the side chains of amino acids in peptides and proteins.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.