I. |hed.ə|rälə̇gəs adjective
Etymology: heter- + Greek logos proportion, word + English -ous — more at legend
1. : characterized by heterology : consisting of different elements or of like elements in different proportions : different
2. : derived from a different species
heterologous serum
— compare autologous , homologous
• het·er·ol·o·gous·ly adverb
II. adjective
: characterized by cross-reactivity