Definition of: homologous

(hō·mol′ə·gəs) adjective
1. Having a similar structure, proportion, value, or position.
2. Proportional to each other.
3. Identical in nature, relation, or the like.
4. Biol. Denoting either of a pair of sexually differentiated chromosomes which unite at meiosis.
5. Med. Pertaining to or designating a serum protecting against the same bacterium from which it was prepared. [<Gk. homologos agreeing <homos the same + logos speech <legein speak]