Webster's English Dictionary

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genetics

ge.net.ics \j*-'net-iks\ n pl but sing in constr  1a: a branch of biology 
   that deals with the heredity and variation of organ isms and with the 
   mechanisms by which these are effected 1b: a treatise or textbook on this 
   subject  2: the genetic makeup and phenomena of an organism, type, group, 
   or conditi on 3: GENESIS