1. (noun)Ross, John Ross, Sir John Ross Scottishexplorer who led Arctic expeditions that yielded geographic discoveries while searching for the NorthwestPassage (1777-1856)
2. (noun)Ross, James Clark Ross, Sir James Clark Ross Britishexplorer of the Arctic and Antarctic; located the north magnetic pole in 1831; discovered the Ross Sea in Antarctica; nephew of Sir JohnRoss (1800-1862)
3. (noun)Ross, Sir Ronald Ross Britishphysician who discovered that mosquitos transmit malaria (1857-1932)