Crookes

American  

[krooks] / krʊks /

noun

1. Sir William, 1832–1919, English chemist and physicist: discovered the element thallium and the cathode ray.

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Crookes British  

/ krʊks /

noun

1. Sir William. 1832–1919, English chemist and physicist: he investigated the properties of cathode rays and invented a type of radiometer and the lens named after him

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Crookes Scientific  

/ krks /

1. British chemist and physicist who discovered thallium in 1861 and invented the radiometer (1873–76). He also developed the Crookes tube, a modified vacuum tube that was later used by W.C. Roentgen and J.J. Thomson in experiments that led to the discovery of x-rays and the electron, respectively.

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Example Sentences

Joy Crookes knows a thing or two about music.

From BBC • Sep. 18, 2025

The role took Crookes, who plays an older sister to the lead character, all the way to the Venice Film Festival, where the movie won the coveted audience award.

From BBC • Sep. 18, 2025

Doris Ludlam, 80, Bridget Bourke, 88, Irene Crookes, 79, and Ethel Hall, 86, were being treated on orthopaedic wards where Campbell worked in Leeds in 2002 and developed unexplained hypoglycaemia.

From BBC • Jun. 26, 2025

"Joy Crookes is an artist who I've never seen live before who I love to hang out with on the radio," he says.

From BBC • May 22, 2025

She next gave her last instructions to Mr. Crookes.

From Mysterious Psychic Forces An Account of the Author's Investigations in Psychical Research, Together with Those of Other European Savants by Flammarion, Camille