Definitions for homology
həˈmɒl ə dʒi, hoʊ-ho·mol·o·gy

Princeton's WordNetRate this definition:0.0 / 0 votes

1. homologynoun

   the quality of being similar or corresponding in position or value or structure or function

WiktionaryRate this definition:0.0 / 0 votes

1. homologynoun

   A homologous relationship.

2. homologynoun

   A correspondence of structures in two life forms with a common evolutionary origin, such as flippers and hands.

3. homologynoun

   The relationship between the elements in the same group of the periodic table, or between organic compounds in a homologous series.

4. homologynoun

   A theory associating a system of quotient groups to each topological space.

5. homologynoun

   A system of quotient groups associated to a topological space.

6. homologynoun

   The presence of the same series of bases in related genes.

ChatGPTRate this definition:0.0 / 0 votes

1. homology

   Homology is a concept in biological, chemical and mathematical fields which refers to the similarity or identical properties between two or more structures due to shared ancestry or common design principles. 1. In biology, it refers to the existence of shared ancestry between a pair of structures or genes in different species. 2. In chemistry, it refers to compounds having a similar structure with a repetition of the same chemical group within the compound. 3. In mathematics, specifically in algebraic topology, it's a way to associate a sequence of algebraic objects to a topologically structured object like a topological space or a chain complex. Regardless of domain, the underlying concept of homology signifies a fundamental shared attribute or characteristic.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Homologynoun

   the quality of being homologous; correspondence; relation; as, the homologyof similar polygons

2. Homologynoun

   correspondence or relation in type of structure in contradistinction to similarity of function; as, the relation in structure between the leg and arm of a man; or that between the arm of a man, the fore leg of a horse, the wing of a bird, and the fin of a fish, all these organs being modifications of one type of structure

3. Homologynoun

   the correspondence or resemblance of substances belonging to the same type or series; a similarity of composition varying by a small, regular difference, and usually attended by a regular variation in physical properties; as, there is an homology between methane, CH4, ethane, C2H6, propane, C3H8, etc., all members of the paraffin series. In an extended sense, the term is applied to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Cf. Heterology

4. Etymology: [Gr. agreement. See Homologous.]

WikidataRate this definition:0.0 / 0 votes

1. Homology

   The concept of homology is fundamental to the field of comparative biology. In 1843, Richard Owen defined homology as "the same organ in different animals under every variety of form and function". Homology is evaluated strictly in an evolutionary context. That is, organs in two species are homologous only if the same structure was present in their last common ancestor. Organs as disparate as a bat's wing, a seal's flipper, a cat's limb and a human arm have a common underlying anatomy which was present in their last common ancestor and so therefore are homologous as forelimbs. Homologous traits of organisms are therefore due to descent from a common ancestor. The opposite of homologous organs are analogous organs which do similar jobs in two taxa that were not present in the last common ancestor but rather evolved separately. An example of an analogous trait would be the wings of bats and birds, which evolved independently in each lineage separately after diverging from an ancestor without wings. It is important to distinguish between different hierarchical levels of homology in order to make informative biological comparisons. In the above example, the bird and bat wings are analogous as wings, but homologous as forelimbs because the organ served as a forearm in the last common ancestor of tetrapods. Homology can also be described at the level of the gene. In genetics homology can refer to both the gene and the corresponding protein product.

Matched Categories

1. • Similarity

How to pronounce homology?

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How to say homology in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of homology in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of homology in Pythagorean Numerology is: 2

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=homology
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Homology
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/homology
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=homology