Medical Definition of homologous
1a: having the same relative position, value, or structure: as (1): exhibiting biological homology (2): having the same or allelic genes with genetic loci usually arranged in the same order <homologous chromosomes>b: belonging to or consisting of a chemical series whose members exhibit homology
2a: derived from or involving organisms of the same species <homologous tissue grafts>—compare autologous, heterologous 1b: relating to or being immunity or a serum produced by or containing a specific antibody corresponding to a specific antigen
Seen and Heard
What made you want to look up homologous? Please tell us where you read or heard it (including the quote, if possible).