1. (noun) United States chemist noted for discovering the series of chemical reactions in photosynthesis (1911-)

• melvin calvin

2. (noun) Swiss theologian (born in France) whose tenets (predestination and the irresistibility of grace and justification by faith) defined Presbyterianism (1509-1564)

• jean caulvin
• jean cauvin
• jean chauvin
• john calvin