\Het`er*ol"o*gous\, a. [Hetero- + Gr. ?
proportion.]
Characterized by heterology; consisting of different
elements, or of like elements in different proportions;
different; -- opposed to homologous; as, heterologous organs.
{Heterologous stimulus}. (Physiol.) See under {Stimulus}.
{Heterologous tumor} (Med.), a tumor differing in structure
   from the normal tissues of the body.