noun (used with a singular verb)
Biology, Statistics. biostatistics.
biometry ( def 1 ).
the process by which a person's unique physical and other traits are detected and recorded by an electronic device or system as a means of confirming identity: Scanning of the human iris is a reliable form of biometrics.

1900–05; biometr(y) + -ics

biometric, biometrical, adjective
biometrically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
biometry or biometrics (baɪˈɒmɪtrɪ, ˌbaɪəˈmɛtrɪks)
1.  a.  the analysis of biological data using mathematical and statistical methods
 b.  the practice of digitally scanning the physiological or behavioural characteristics of individuals as a means of identification
2.  the statistical calculation of the probable duration of human life
biometrics or biometrics
bio'metrically or biometrics

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"application of mathematics to biology," 1902, from biometric (also see -ics); slightly earlier in this sense was biometry (1901), which was coined by Whewell and used by him and others with a sense of "calculation of life expectancy" (1831).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

biometrics definition

The measuring and analysis of such physical attributes as facial features and voice or retinal scans. This technology can be used to define an individual's unique identity, often for security purposes.

Note: Software is available that can match faces of individuals videotaped on the street to the picture of a suspected criminal or terrorist in a database. The use of biometrics is likely to increase in the future as security concerns become more of a priority for both governments and corporations following the September 11 attacks (2001).
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Computing Dictionary

biometrics definition

security, hardware
The use of special input devices to analyse some physical parameter assumed to be unique to an individual, in order to confirm their identity as part of an authentication procedure.
Examples include fingerprint scanning, iris recognition, facial recognition, voice recognition (speaker recognition), signature, vascular pattern recognition.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
He applied statistical methods to the study of evolution and heredity and
  called this science biometrics.
Biometrics are sure to grow in importance for both governments and companies.
The use of biometrics to identify voters, being tested this year, should cut
  out impersonation too.
Biometrics has promise but the technologies are neither standardized nor
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