D/F

or DF

D.F.

1
  1. Defender of the Faith.

Origin of D.F.

1
From the New Latin word Dēfēnsor Fidēī

D.F.

2
  1. Distrito Federal.
  2. Doctor of Forestry.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for df

DF

abbreviation for
  1. Defender of the Faith

D/F

DF

abbreviation for
  1. direction finder
  2. direction finding
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

df in Medicine

df

abbr.
  1. decayed and filled (deciduous teeth)

DF

abbr.
  1. decayed and filled (permanent teeth)
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.