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

Also added to Boardmasters' line-up are Joy Crookes, Rose Gray and Jacob Alon, who won the Brits' Critics' Choice earlier this month.

From BBC • Jan. 28, 2026

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

According to chairman Mike Crookes, the facility would "blight this area" and the economic impact on tourism could be "profound" and "catastrophic".

From BBC • Oct. 21, 2024

This Friday, she releases a star-studded debut album, Godspeed, which features Kylie Minogue, Joy Crookes and Jamie Principle.

From BBC • Oct. 16, 2024

Professor Crookes amused himself, at times, by replying to these fantastic attacks, but, naturally, without convincing his uncompromising opponents.

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