homology: Meaning and Definition of

ho•mol•o•gy

1. the state of being homologous; homologous relation or correspondence.
1. a fundamental similarity based on common descent.
2. a structural similarity of two segments of one animal based on a common developmental origin.
3. the similarity of organic compounds of a series in which each member differs from its adjacent compounds by a fixed increment, as by CH.
4. a classification of figures according to certain topological properties.