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Pronunciation: fi


  1. The 21st letter of the Greek alphabet.
  2. (F) Symbol for phenyl; potential energy; magnetic flux.
  3. (f) Symbol for plane angle; volume fraction; quantum yield; the dihedral angle of rotation about the N–Ca bond associated with a peptide bond.

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