n. That which is heteronymous; a thing having a different name or designation from some other thing; -- opposed to homonym. [ 1913 Webster ]
a. [ Hetero- + Gr. "o`nyma, for "o`noma a name. ] Having different names or designations; standing in opposite relations. J. Le Conte.
-- Het"er*on"y*mous*ly, adv. [ 1913 Webster ]