Search Result for "nondisjunction": 
Wordnet 3.0

NOUN (1)

1. meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells; 



WordNet (r) 3.0 (2006):

nondisjunction
    n 1: meiosis in which there is a failure of paired homologous
         chromosomes to separate; results in an abnormal number of
         chromosomes in the daughter cells