The similarity of a structure or function of parts of different origins based on their descent from a common evolutionary ancestor is homology. Analogy, by contrast, is a functional similarity of …

HOMOLOGY definition: the state of being homologous; homologous relation or correspondence. See examples of homology used in a sentence.

In biology, homology is similarity in anatomical structures or genes between organisms of different taxa due to shared ancestry, regardless of current functional differences.

Jul 14, 2023 · In biology, homology refers to similarities caused by shared ancestry between two structures or genes from distinct species.

homology, in biology, similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor.

Homology is a hierarchical concept, and therefore the "things" refer to different items at each level. According to this definition, a "thing" either is a homolog to some other "thing," or it is not.

homology 1. similarity of form or structure in two or more organisms owing to common descent. 2. similarity in form or structure between different parts of an organism owing to common origin. Cf. …

Definition of 'homology' homology in British English (həʊˈmɒlədʒɪ ) noun Word forms: plural -gies

Homology refers to the similarity in structure, origin, or position between different organisms or parts, often due to shared ancestry. It is a key concept in biology and genetics.

Dec 27, 2025 · homology (countable and uncountable, plural homologies) The relationship of being homologous; a homologous relationship.