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epigenetics

[ep-i-juh-net-iks]
noun (used with a singular verb)
  1. Genetics. the study of the process by which genetic information is translated into the substance and behavior of an organism: specifically, the study of the way in which the expression of heritable traits is modified by environmental influences or other mechanisms without a change to the DNA sequence.
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Origin of epigenetics

1942; coined by Conrad H. Waddington, 1905–75, British biologist; blend of epigenesis and genetics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for epigenetics

epigenetics

noun (functioning as sing)
  1. the study of heritable changes that occur without a change in the DNA sequence
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012