eugenics

Concise Oxford English Dictionary © 2008 Oxford University Press:
eugenics /juːˈdʒɛnɪks/

▶plural noun [treated as sing.] the science of using controlled breeding to increase the occurrence of desirable heritable characteristics in a population.

– derivatives
eugenic adjective,
eugenically adverb,
eugenicist noun & adjective,
eugenist noun & adjective.

– origin C19: from eu- + -gen + -ics.