Cal·vin (kāl'vĭn) French-born Swiss Protestant theologian who broke with the Roman Catholic Church (1533) and set forth the tenets of his theology, known today as Presbyterianism, in Institutes of the Christian Religion (1536).
Calvin, Melvin 1911-1997. American chemist. He won a 1961 Nobel Prize for discovering the series of chemical reactions in photosynthesis.