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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
References in periodicals archive ?
Quite a bit more expensive, but in current production, is the Taiyo-Musen series of Radio Direction Finders. List price for the TD-L1550 with Adcock antenna and 16-foot cable is $3,950.
Besides signal sorting, direction finders can perform other critical functions.
Even an antenna with a modest FOV can be used to provide 360 [degrees] coverage in a direction finder by rotating the antenna.
On the commercial end resides the Rybka-M radio direction finder, a navigation aid "for fishing and merchant ships." It operates in the 0.255- to 0.535-MHz and 1.605- to 3.350-MHz ranges, with an accuracy of 0.5 [degrees].
The simplest Doppler direction finder is shown in Figure 1.
In the wake of its canceled F-15C suppression of enemy air defense (SEAD) program, which included a competition for a new precision direction finder (PDF) targeting system, the Air Force is investigating an alternative "preemptive destruction" SEAD mission.
Even an antenna with a modest FOV can be used as a direction finder with 360 |degrees~ coverage if the antenna is rotated.

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