Skip to Content


Pronunciation: het'er-ol'o-gus


  1. Pertaining to cytologic or histologic elements occurring where they are not normally found.
  2. Derived from an animal of a different species, as the serum of a horse is heterologous for a rabbit.

[hetero- + G. logos, ratio, relation]

See Also: xenogeneic

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.