Definición de Crookes, Sir William en inglés:

Crookes, Sir William

Saltos de línea: Sir Wil|liam Crookes
Pronunciación: /krʊks
 
/
( 1832–1919), English physicist and chemist. In 1861 he discovered the element thallium. This led him indirectly to the invention of the radiometer in 1875. He later developed a vacuum tube (the precursor of the X-ray tube) and in 1903 invented the spinthariscope.

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Palabra del día bimble
Pronunciación: ˈbɪmb(ə)l
verb
walk or travel at a leisurely pace