Definition of Rayleigh, 3rd Baron in US English:

Rayleigh, 3rd Baron

proper noun

  • (1842–1919), English physicist; born John William Strutt. He established the electrical units of resistance, current, and electromotive force. With William Ramsay he discovered argon and other inert gases. Nobel Prize for Physics (1904).

Pronunciation

Rayleigh, 3rd Baron

/ˈrālē/