# Definition of Homology. Meaning of Homology. Synonyms of Homology

Here you will find one or more explanations in English for the word Homology. Also in the bottom left of the page several parts of wikipedia pages related to the word Homology and, of course, Homology synonyms and on the right images related to the word Homology.

## Definition of Homology

Homology
Homology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.] 1. The quality of being homologous; correspondence; relation; as, the homologyof similar polygons. 2. (Biol.) 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. Note: Homology indicates genetic relationship, and according to Haeckel special homology should be defined in terms of identity of embryonic origin. See Homotypy, and Homogeny. 3. (Chem.) 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. General homology (Biol.), the higher relation which a series of parts, or a single part, bears to the fundamental or general type on which the group is constituted. --Owen. Serial homology (Biol.), representative or repetitive relation in the segments of the same organism, -- as in the lobster, where the parts follow each other in a straight line or series. --Owen. See Homotypy. Special homology (Biol.), the correspondence of a part or organ with those of a different animal, as determined by relative position and connection. --Owen.

## Meaning of Homology from wikipedia

- In biology, homology is similarity due to shared ancestry between a pair of structures or genes in different taxa. A common example of homologous structures...
- Homology may refer to: Homology (biology), any characteristic of biological organisms that is derived from a common ancestor Sequence homology, biological...
- Borel–Moore homology Cellular homology Cyclic homology Hochschild homology Floer homology Intersection homology K-homology Khovanov homology Morse homology Persistent...
- Homology modeling, also known as comparative modeling of protein, refers to constructing an atomic-resolution model of the "target" protein from its amino...
- mathematics, singular homology refers to the study of a certain set of algebraic invariants of a topological space X, the so-called homology groups H n ( X )...
- In chemistry, homology is the appearance of homologues. A homologue (also spelled as homolog) is a compound belonging to a series of compounds differing...
- See homology for an introduction to the notation. Persistent homology is a method for computing topological features of a space at different spatial resolutions...
- In algebraic topology, a homology sphere is an n-manifold X having the homology groups of an n-sphere, for some integer n ≥ 1 {\displaystyle n\geq 1} ...
- Sequence homology is the biological homology between DNA, RNA, or protein sequences, defined in terms of shared ancestry in the evolutionary history of...
- In algebraic topology, simplicial homology formalizes the idea of the number of holes of a given dimension in a simplicial complex. This generalizes the...