misdivision
noun
mis·di·vi·sion ˌmis-də-ˈvi-zhən 
plural misdivisions
: improper or incorrect division
The word "nickname" is a misdivision of the phrase "an ekename" …
Nathan Bierma
Nathan Bierma specifically : an abnormal transverse division of a centromere during meiosis or mitosis that results in the formation of two isochromosomes or two telocentric chromosomes
Word History
First Known Use
1850, in the meaning defined above