noun (used with a singular verb)
the branch of physics that deals with very low temperatures.

1955–60; cryo- + -genics Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cryogenics (ˌkraɪəˈdʒɛnɪks)
(functioning as singular) the branch of physics concerned with the production of very low temperatures and the phenomena occurring at these temperatures

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
cryogenics  [%PREMIUM_LINK%]     (krī'ə-jěn'ĭks)  Pronunciation Key 
The scientific study of how matter behaves at very low temperatures, sometimes approaching absolute zero, and how such temperatures can be achieved and maintained. See also superconductivity, superfluid.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
cryogenics [(kreye-uh-jen-iks)]

The branch of technology concerned with the behavior of materials at very low temperatures, particularly temperatures near absolute zero.

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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Example sentences
One simple way to avoid the cryogenics might be to take advantage of the telescope's urban setting.
We keep power on the antennas, so the cryogenics stay cold and they don't get harmed.
We have begun a new program to collect, compile, and correlate property information for materials used in cryogenics.
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