Crookes

American  

[krooks] / krʊks /

noun

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

---

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

---

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.

---

Example Sentences

When Chris Brain first began attending services at St Thomas Crookes in Sheffield in the 1980s, he was seen as charismatic, engaging and passionate.

From BBC • Aug. 21, 2025

Also previewing new material was London soul-pop singer Joy Crookes.

From BBC • Jun. 29, 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

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

From BBC • Oct. 16, 2024

I should think that there is good reason to suppose that the experiments of Crookes are authentic.

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