- Se·ve·ro [suh–vair-oh; Spanish se-ve–raw] /səˈvɛər oʊ; Spanish sɛˈvɛ rɔ/, 1905–93, U.S. biochemist, born in Spain: Nobel Prize in medicine 1959.
- Spanish-born American biochemist. He shared a 1959 Nobel Prize for work on the biological synthesis of nucleic acids.
- Spanish-born American geneticist who in 1955 discovered an enzyme that was used in the first synthesis of artificial RNA. For this work he shared with Arthur Kornberg the 1959 Nobel Prize for physiology or medicine.