English

Noun

1. A homologous relationship
2. A correspondence of structures in two life forms with a common evolutionary origin, such as flippers and hands.
3. The relationship between the elements in the same group of the periodic table, or between organic compounds in a homologous series
4. A theory associating a system of quotient groups to each topological space
5. A system of quotient groups associated to a topological space
6. The presence of the same series of bases in related genes

Derived terms

• cohomology
• microhomology

Related terms

• analogy
• homologue

Translations

• French: homologie
• German: Homologie

• Homology (anthropology), analogy between human beliefs, practices or artifacts due to genetic or historical connections.
• Homology (biology): similar structures due to shared ancestry.
• Homology (chemistry): a compound of a series differing only by repeated units
• Homology (mathematics), a procedure to associate a sequence of abelian groups or modules with a given mathematical object.
• Homology (sociology), a structural 'resonance' between the different elements making up a socio-cultural whole.
• Homology modeling, a method of protein structure prediction

• Homologous series (chemistry), a series of organic compounds with a similar general formula.
• Homologous temperature, the temperature of a material as a fraction of its absolute melting point.
• Homologous chromosomes, chromosomes in a biological cell that pair up (synapse) during meiosis.