meiosis
mei.o.sis \mi--'o--s*s\ \mi--'a:t-ik\ \-i-k(*-)le-\ n [NL, fr. Gk meio-sis diminution, fr. meioun to diminish, fr. ]meio-n less - more at MINOR : the sequence of complex nuclear changes resulting in the production of c ells (as gametes) with half the number of chromosomes present in the original cell and typically involving first an actual reduction division in which the chromosomes without undergoing prior splitting separate so that of each pair a chromosome from one parent only enters each daughter nucleus and secondly a mitotic division - mei.ot.ic aj
Webster's English Dictionary