homology
Definition from Wiktionary, the free dictionary
Contents
English[edit]
Noun[edit]
homology (plural homologies)
 A homologous relationship.
 (biology) A correspondence of structures in two life forms with a common evolutionary origin, such as flippers and hands.
 (chemistry) The relationship between the elements in the same group of the periodic table, or between organic compounds in a homologous series.
 (mathematics) A theory associating a system of quotient groups to each topological space.
 (mathematics) A system of quotient groups associated to a topological space.
 (genetics) The presence of the same series of bases in related genes.
Usage notes[edit]
 Like many terms that start with a (nonsilent) h and have emphasis on their second syllable, some people precede homology with an, others with a.
 (biology): For a discussion of the use of the term homology (and by association homologous) in biology, see: Patterson, Colin. "Homology in Classical and Molecular Biology." Molecular Biology and Evolution 5, no. 6 (November 1988): 603–625. http://mbe.oxfordjournals.org/cgi/reprint/5/6/603.pdf (accessed 18 December 2009; archived 18 December 2009, http://www.webcitation.org/5m7rn4rCe )
 (mathematics): When used attributively before the name of a topological space, as in "homology nsphere" or "homology manifold", the reference is to a space whose homology is the same as that of the space mentioned: an homology manifold, for example, is a space whose homology is that of some manifold.
Derived terms[edit]
Related terms[edit]
Translations[edit]
homologous relationship


biology: correspondence of structures in two life forms with a common evolutionary origin

chemistry: relationship between the elements in the same group of the periodic table

mathematics: theory associating a system of quotient groups to each topological space
mathematics: system of quotient groups associated to a topological space
 The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.