From HomoExcelsior

1. Corresponding or similar in position, value, structure, or function. 2. Similar in structure and evolutionary origin, though not necessarily in function, as the flippers of a seal and the hands of a human being. 3. Relating to the correspondence between an antigen and the antibody produced in response to it. 4. Having the same morphology and linear sequence of gene loci as another chromosome. 5.  group.

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