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Willughby, Francis

(Encyclopedia)Willughby, Francis wĭlˈəbē [key], 1635–72, English naturalist. He is known especially for his early systematic work on birds and fishes, in which he made some of the most important contributions...

devilfish

(Encyclopedia)devilfish, name applied to the manta ray and to an American species of octopus. ...

Roentgen, Wilhelm Conrad

(Encyclopedia)Roentgen or Röntgen, Wilhelm Conrad both: rĕntˈgĭn, rŭntˈ–, Ger. vĭlˈhĕlm kônˈrät röntˈgən [key], 1845–1923, German physicist. His notable research in many fields of physics, especi...

CAT scan

(Encyclopedia)CAT scan kăt [key] [computerized axial tomography], X-ray technique that allows relatively safe, painless, and rapid diagnosis in previously inaccessible areas of the body; also called CT scan. An X-...

Rickey, Branch

(Encyclopedia)Rickey, Branch, 1881–1965, American baseball executive, b. Stockdale, Ohio. As manager or executive, he was with the St. Louis Browns (1913–15), the St. Louis Cardinals (1917–42), the Brooklyn D...

Bragg, Sir William Lawrence

(Encyclopedia)Bragg, Sir William Lawrence, 1890–1971, English physicist, b. Adelaide, Australia, educated in Australia and at Trinity College, Cambridge; son of W. H. Bragg. He was professor of physics at Victori...

Hodgkin, Dorothy Mary Crowfoot

(Encyclopedia)Hodgkin, Dorothy Mary Crowfoot, 1910–94, English chemist and X-ray crystallographer, b. Egypt. She received the 1964 Nobel Prize in chemistry for determining the structure of biochemical compounds (...

Watt, James

(Encyclopedia)Watt, James, 1736–1819, Scottish inventor. While working at the Univ. of Glasgow as an instrument maker, Watt was asked to repair a model of Thomas Newcomen's steam engine. He devised improvements t...

reflection

(Encyclopedia)CE5 Image formation by curved mirrors and lenses reflection, return of a wave from a surface that it strikes into the medium through which it has traveled. The general principles governing the ref...

Bragg, Sir William Henry

(Encyclopedia)Bragg, Sir William Henry, 1862–1942, English physicist, educated at King William's College, Isle of Man, and Trinity College, Cambridge. He served on the faculties of the Univ. of Adelaide in Austra...