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dysgenics

[dis-jen-iks]
noun (used with a singular verb) Biology.
  1. the study of the operation of factors that cause degeneration in offspring.
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Origin of dysgenics

First recorded in 1915–20; see origin at dysgenic, -ics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for dysgenics

dysgenics

noun
  1. (functioning as singular) the study of factors capable of reducing the quality of a race or strain, esp the human raceAlso called: cacogenics
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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