homologous

https://doi.org/10.1351/goldbook.10807
  1. Having the same relationship, relative position, or structure.
  2. (Of organs) Similar in position, structure, and evolutionary origin but not necessarily in function.
  3. (Of chromosomes) Pairing at meiosis and having the same structural features and pattern of genes.
  4. (Of a series of chemical compounds) Having the same functional group(s) but differing in structure by a fixed group of atoms.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 764 (https://doi.org/10.1515/pac-2015-1202)