| heterologous serotype | An antibody that was induced by one antigen and reacts with another antigen. (05 Mar 2000) |
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| heterologous stimulus | A stimulus that acts upon any part of the sensory apparatus or nerve tract. (05 Mar 2000) |
| heterologous tumour | A tumour composed of a tissue unlike that from which it springs. (05 Mar 2000) |
| heterologous twins | Dizygotic twins are siblings who have shared a common uterine environment. They are due to fertilization of two different ova by different sperm. Dizygotic twins are also called fraternal twins. (12 Dec 1998) |
| transplantation, heterologous | Transplantation between animals of different species. (12 Dec 1998) |