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minnow

(Encyclopedia)minnow, common name for the Cyprinidae, a large family of freshwater fish which includes the carp (Cyprinus carpio), and of which there are some 2,400 species. Minnows have soft-rayed fins and teeth i...

thermite

(Encyclopedia)thermite [from Thermit, a trade name], mixture of powdered or granular aluminum metal and powdered iron oxide. When ignited it gives off large amounts of heat. In wartime it has been used in incendiar...

repoussé

(Encyclopedia)repoussé rəpo͞osāˈ [key], the process or the product of ornamenting metallic surfaces with designs in relief hammered out from the back by hand. Gold and silver are most commonly used today for f...

Ives, Frederic Eugene

(Encyclopedia)Ives, Frederic Eugene, 1856–1937, American inventor, b. Litchfield, Conn. A pioneer in the development of orthochromatic and trichromatic photography and of photoengraving, he followed an earlier su...

Cornforth, Sir John Warcup

(Encyclopedia)Cornforth, Sir John Warcup wôrˈkəp côrnˈfərth [key], 1917–2013, Australian chemist, Ph.D. Oxford, 1941. Although Cornforth suffered a hearing loss from childhood and was deaf by the time he gr...

Appomattox

(Encyclopedia)Appomattox ăpəmătˈəks [key], town (2020 pop. 16,119), seat of Appomattox co., central Va.; inc. 1925. Confederate general Robert E. Lee surrendered to Union general U...

Pio of Pietrelcina, Saint

(Encyclopedia)Pio of Pietrelcina, Saint, 1887–1968, Italian Capuchin friar and mystic known as Padre Pio. Born Francesco Forgione, he was a sickly child who experienced visions and ecstasies at a young age and en...

Day, Benjamin

(Encyclopedia)Day, Benjamin, 1838–1916, American printer; son of Benjamin Henry Day. While working in New York City, Day invented a process, utilizing celluloid sheets, for shading plates in the color printing of...

Roebuck, John

(Encyclopedia)Roebuck, John, 1718–94, English physician, chemist, and inventor. He acted as a chemical consultant to local industries in Birmingham and invented the lead chamber process of manufacturing sulfuric ...

Hargreaves, James

(Encyclopedia)Hargreaves, James härˈgrēvz [key], 1720?–1778, English engineer. In 1762 he made an unsuccessful attempt to develop a machine for carding, a process preparatory to spinning, and in 1764 he invent...