Lord, title of John William Strutt, 1842–1919, British physicist. He discovered argon (1894) with Ramsay and made important contributions to the theory of sound, the theory of scattering of radiation, etc. Nobel prize for physics 1904
Rayleigh in American English
(ˈreɪli)
3d Baron(John William Strutt) 1842-1919; Eng. physicist