Characterized by heterology; consisting of different elements, or of like elements in different proportions; different; -- opposed to homologous; as, heterologous organs.

referring to certain cells and antisera derived from a different individual or species, one immunologically related but not identical (a heterologous skin graft, for example, would not come directly from its own recipient).

(i) DNA regions coding for the same function but with differences in their nucleotide sequences; (ii) DNAs which originate from different species.

not corresponding in structure or evolutionary origin