homolog

noun5

1. •
   Something homologous; a homologous organ or part, chemical compound, chromosome, gene, or cultural element.
2. •
   A phoneme, morpheme, or word shared by two languages or dialects, via cognation or naturalization.
3. •
   One of a group of similar DNA sequences that share a common ancestry, or the peptides or proteins that they encode; the counterpart gene or protein in another taxon evolved from a common ancestor (molecularly it may be either identical or similar).

   • TP53 is the human homolog of murine Trp53.
4. •
   A member of a homologous series.
5. •
   A belief, practice, concept, or artifact that has a counterpart in another culture.