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

Joy Crookes knows a thing or two about music.

From BBC • Sep. 18, 2025

The following summer, Crookes played Glastonbury's Pyramid Stage for the first time, bursting into tears at the scale of the occasion.

From BBC • Sep. 18, 2025

Johnson sang with Jungle when they headlined the West Holts Stage last year, while his bandmate Barney Lister is an award-nominated writer/producer for acts like Joy Crookes, Celeste, Olivia Dean and Obongjayar.

From BBC • Jun. 23, 2025

King, Katie, a materialized spirit, 141; appears to Florence Cook and others, 334; investigated by Crookes and other scientist, 335-346; Home's opinion of her, 343.

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