The act by which something is crooked.

plural of crooking

A town in County Durham, England. / A village in South Lakeland district, Cumbria, England. / A statutory town in Logan County, Colorado, United States, named after George Crook

A surname. / A township in Renville County, Minnesota, United States. / A city in Minnehaha County, South Dakota, United States.

An early experimental electrical discharge tube by means of which cathode rays and X-rays were discovered.

light mill

plural of Crookes tube

plural of Crookes radiometer

(physics, dated) The dark space within the negative-pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge.

Synonym of Crookes space