Definition of "Hess" :

noun: United States physicist (born in Austria) who was a discoverer of cosmic radiation (1883-1964)

noun: Nazi leader who in 1941 flew a solo flight to Scotland in an apparent attempt to negotiate a peace treaty with Great Britain but was imprisoned for life (1894-1987)

noun: Swiss physiologist noted for studies of the brain (1881-1973)

noun: English pianist (1890-1965)