homoscedasticity
noun
ho·mo·sce·das·tic·i·ty ˌhō-mō-si-ˌda-ˈsti-sə-tē 
ˌhä-
: the property of having equal statistical variances
homoscedastic
ˌhō-mō-si-ˈda-stik
adjective ˌhä-
Word History
Etymology
hom- + Greek skedastikos able to disperse, from skedannynai to disperse
First Known Use
1905, in the meaning defined above