Home › Words › H › hexasomyhexasomyhexasomy · noun — A form of aneuploidy featuring the presence of six homologues of the same chromosome.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom hexasom(ic) + -y.nounA form of aneuploidy featuring the presence of six homologues of the same chromosome.Definitions & examples from Wiktionary (CC BY-SA 3.0).