I. ˌkämpləmən.ˈtāshən, -lə(ˌ)men- noun
( -s )
1. : the formation of neutral colors from complementaries
2. : complementary distribution
3. logic : the forming of a complement or negate specifically of a class
II. noun
1. : the determination of the complement of a given mathematical set
2. : production of normal phenotype in an individual heterozygous for two closely related mutations with one on each homologous chromosome and at a slightly different position