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1. a grade or rank within a series, especially a rank awarded to scholars by a college or university.
2. a unit of measure of temperature.
3. a unit of measure of arcs and angles, one degree being 1/360 of a circle.
4. one of the ranks or stages in a progressive series.
d's of freedom (df) the number of ways that the members of a sample can vary independently. For example, if a sample contains n scores and the sum of those scores is known, n − 1 scores are free to vary; the nth score, however, is not free to vary but is determined by the values of the other scores and the established sum of the scores. In this example, the degrees of freedom equal the sample size minus 1 (df = n − 1).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


, DF
Abbreviation for decayed and filled teeth.Synonym(s): df caries index
Farlex Partner Medical Dictionary © Farlex 2012


, df
Abbreviation for df caries index.
Medical Dictionary for the Dental Professions © Farlex 2012