Same as isomorphous.In biology, being of the same or like form; morphologically alike; equiformed.In biology:Different in ancestry, but alike in appearance; heterophyletic; convergent.In group-theory, related, as the group Γ to the group G, so that to every substitution g of G corresponds one substitution γ of Γ, and to the product gg ′ of any two substitutions of G corresponds the product γγ′ of the two corresponding substitutions of Γ.