Meaning of COMPLEMENTATION in English

COMPLEMENTATION

[com.ple.men.ta.tion] n (1942) 1: the operation of determining the complement of a 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

Merriam-Webster English vocab.      Английский словарь Merriam Webster.