Etymology

Noun

1. the similarity in form of organisms of different ancestry
2. A bijection f such that both f and its inverse f ⁻¹ are homomorphisms, that is, structure-preserving mappings.
3. the similarity in the crystal structures of similar chemical compounds
4. the similarity in the structure or processes of different organizations
5. a one-to-one correspondence between all the elements of two sets, e.g. the instances of two classes, or the records in two datasets