Definition of Overhauser effect in US English:

Overhauser effect

noun

Chemistry
  • More fully "nuclear Overhauser effect". An effect whereby changing the populations of spin states of a nucleus by selective radio-frequency irradiation results in an enhanced magnetic resonance of nearby nuclei.

Origin

1950s; earliest use found in Science. From the name of Albert Warner Overhauser, U.S. physicist, who published an account of the phenomenon in 1953 ( Physical Rev 89 689) + effect.

Pronunciation

Overhauser effect

/ˈəʊvəˌhaʊzə(r) ɪˌfɛkt/