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1. An apparatus for measuring the optical density of a material, such as a photographic negative.

den′si·tom′e·try (-trē) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun1.densitometry - measuring the optical density of a substance by shining light on it and measuring its transmission
measurement, measuring, mensuration, measure - the act or process of assigning numbers to phenomena according to a rule; "the measurements were carefully done"; "his mental measurings proved remarkably accurate"
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References in periodicals archive ?
Body fat can be measured in a number of different ways including underwater weighing or measured via calipers by a trained professional.
Numerous methods such as skinfolds, bioelectrical impedance analysis (BIA), underwater weighing and dual-energy x-ray absorptiometry (DXA) have been used to estimate body composition [1-3].
Underwater weighing is thought to be the most accurate fat measurement method, but because it must be performed in a lab, it's costly and not as widely available as other methods.
For years, underwater weighing, or the "dunk tank," was the "gold standard" to determine fat versus lean body mass.
Their fat was calculated by skinfold measurements, hand-to-foot bioelectrical impedance (BIA), foot-to-foot BIA (such as the Tanita scale), Futrex (one measurement on the arm) and underwater weighing.
A review of 389 Caucasian adults established that there was a high level of correlation between FFM assessed by DXA and those calculated from body water, underwater weighing and body potassium [19].

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