1) Having the same variance 
An alternate spelling of homoskedastic. McCulloch (1985) argues that the spelling with the k is preferred, on the basis of the pronunciation and etymology (Greek not French derivation) of the term. Source: J. Huston McCulloch. 1985. 'On heteros*edasticity' Econometrica 53:2 (March, 1985), p 483. With thanks to: Shazam web site which cited...
homoscedastic Characterized by equal statistical variances.
having the same variance.