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Orpen, Sir William

(Encyclopedia)Orpen, Sir William, 1878–1931, British portrait and genre painter, b. Ireland. He is best known for his scenes of Irish daily life, his paintings and sketches of life at the front in World War I, an...

conglomerate, in geology

(Encyclopedia)conglomerate, in geology, sedimentary rock composed largely of pebbles or other rounded particles whose diameter is larger than 2 mm (.08 in.). Essentially a cemented gravel, conglomerates are formed ...

Cavedone, Giacomo

(Encyclopedia)Cavedone, Giacomo jäˈkōmō kävādôˈnā [key], 1577–1660, Italian painter, of the Bolognese school. He assisted Guido Reni in Rome, but his reputation as a master of color and composition was w...

Hui-tsung

(Encyclopedia)Hui-tsung hwē-dzo͞ong [key], 1082–1135, Chinese emperor of the Northern Sung dynasty, painter, and a great patron of art. Politically he was a rather ineffectual ruler, but he was said to have dev...

Tanner, Henry Ossawa

(Encyclopedia)Tanner, Henry Ossawa, 1859–1937, American painter, b. Pittsburgh; son of a bishop of the African Methodist Episcopal Church. He studied with Eakins in Philadelphia and in Paris. Tanner made many tri...

Food and Drug Administration

(Encyclopedia)Food and Drug Administration (FDA), agency of the Public Health Service division of the U.S. Department of Health and Human Services. It is charged with protecting public health by ensuring that foods...

foot-and-mouth disease

(Encyclopedia)foot-and-mouth disease or hoof-and-mouth disease, highly contagious disease almost exclusive to cattle, sheep, swine, goats, and other cloven-hoofed animals. It is caused by a virus, specifically an a...

perfluoroalkyl and polyfluoroalkyl substances

(Encyclopedia)perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS, which resist w...

monsters and imaginary beasts

(Encyclopedia)monsters and imaginary beasts. The mythologies and legends of ancient and modern cultures teem with an enormous variety of monsters and imaginary beasts. A great number of these are composites of diff...

São Tomé and Principe

(Encyclopedia)CE5 São Tomé and Principe prēnˈsēpə [key], officially Democratic Republic of São Tomé and Principe, republic (2015 est. pop. 196,000), 372 sq mi (964 sq km), W Africa, in the Gulf of Guinea...