Definition of Ramsay, Sir William in US English:

Ramsay, Sir William

proper noun

  • (1852–1916), Scottish chemist; discoverer of the noble gases. He discovered argon and helium and codiscovered neon, krypton, xenon, and radon. He also determined their atomic weights and places in the periodic table. Nobel Prize for Chemistry (1904).


Ramsay, Sir William