The Collaborative International Dictionary of English v.0.48:

Eugenics \Eu*gen"ics\, n.
   The science of improving stock, whether human or animal. --F.
   Galton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

eugenics
    n 1: the study of methods of improving genetic qualities by
         selective breeding (especially as applied to human mating)
         [ant: cacogenics, dysgenics]

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "eugenics":
   Altmann theory, DNA, De Vries theory, Galtonian theory,
   Great Leap Forward, Mendelianism, Mendelism, RNA, Verworn theory,
   Weismann theory, Weismannism, Wiesner theory, advance, advancement,
   allele, allelomorph, amelioration, amendment, ascent, bettering,
   betterment, birth, boost, character, chromatid, chromatin,
   chromosome, determinant, determiner, diathesis, endowment,
   enhancement, enrichment, euthenics, factor, furtherance, gene,
   genesiology, genetic code, genetics, headway, hereditability,
   heredity, heritability, heritage, improvement, inborn capacity,
   inheritability, inheritance, lift, matrocliny, melioration, mend,
   mending, patrocliny, pharmacogenetics, pickup, preferment,
   progress, progression, promotion, recessive character, recovery,
   replication, restoration, revival, rise, upbeat, uplift, upping,
   upswing, uptrend, upward mobility