hering

noun

1. E·wald [ey-vahlt] /ˈeɪ vɑlt/, 1834–1918, German physiologist and psychologist.

noun

1. Ewald (ˈɛvalt). 1834–1918, German physiologist and experimental psychologist who studied vision and propounded the doctrine of nativism, the policy of favouring the natives of a country over the immigrants