[tod] 
,| 1. | Alexander Ro⋅ber⋅tus [roh-bur-tuh s] (Baron of Trumpington), 1907–97, Scottish chemist: Nobel prize 1957. |
| 2. | David, 1855–1939, U.S. astronomer and teacher. |
| 3. | a male given name. |
Todd (tŏd), Sir Alexander Robertus. Born 1907.
British chemist. He won a 1957 Nobel Prize for his study of nucleic acids and nucleotide structures.