homologous

 
Pronunciation: /hɒˈmɒləgəs/

adjective

  • having the same relation, relative position, or structure.
  • Biology (of organs) similar in position, structure, and evolutionary origin but not necessarily in function: a seal’s flipper is homologous with the human armOften contrasted with analogous.
  • Biology (of chromosomes) pairing at meiosis and having the same structural features and pattern of genes.
  • Chemistry (of a series of chemical compounds) having the same functional group but differing in composition by a fixed group of atoms.

Derivatives

homology

noun

Origin:

mid 17th century: via medieval Latin from Greek homologos 'agreeing, consistent', from homos 'same' + logos 'ratio, proportion'