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true

1. Music exactly in tune
2. (of a compass bearing) according to the earth's geographical rather than magnetic poles
3. Biology conforming to the typical structure of a designated type
4. Physics not apparent or relative; taking into account all complicating factors
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

true

[trü]
(geodesy)
Related to true north.
(science and technology)
Actual, as constrasted with fictitious, such as true sun.
Related to a fixed point, either on the earth or in space, in contrast with relative, which is related to a moving point.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In all experiments, the observed rates of hypoglycemia and hyperglycemia, the percentage of time that true glucose was in the target range, and the variability (SD) of hourly true glucose measurements were monitored as outcomes.
If the true glucose value of a blood specimen is 100 mg/dl, then 99.75 per cent of the time all measurements made on the specimen by this method fall between 91.6 mg/dl and 108.4 mg/dl ([plus-or-minus] 3 SD).
where [Gluc.sub.T] is the true glucose concentration; Glucm is the measured glucose concentration reflecting the effects of analytical imprecision, bias, and random interferences; [CV.sub.I] is the CV of the assay expressed as a fraction; [CV.sub.RI] is the CV of the random interferences component expressed as a fraction; n(0,1) is a random number drawn from a gaussian distribution with a mean of 0 and a SD of 1; and bias is the assay bias (expressed as a fraction).
We reasoned that a method with high imprecision or bias would frequently yield results sufficiently different from the patient's true glucose that the insulin dose would differ from the intended dose.