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Copenhagen, battle of

(Encyclopedia)Copenhagen, battle of, 1801, an important incident of the French Revolutionary Wars. In Dec., 1800, Denmark joined Russia, Sweden, and Prussia in declaring the armed neutrality of the northern powers ...

Triceratops

(Encyclopedia)Triceratops trīsĕrˈətŏps [key] [Gr., = three-horn face], genus of ornithischian quadruped dinosaurs of the late Cretaceous period. Because of some variations in sample fossils, it was thought...

Orion Nebula

(Encyclopedia)Orion Nebula, bright diffuse nebula in the constellation Orion; also known as the Great Nebula of Orion and cataloged as M42 or NGC 1976. It is located near the middle of the “sword” hanging from ...

herpes zoster

(Encyclopedia)herpes zoster, infection of a ganglion (nerve center) with severe pain and a blisterlike eruption in the area of the nerve distribution, a condition called shingles. The causative organism is varicell...

albino

(Encyclopedia)albino ălbīˈnō [key] [Port.,=white], animal or plant lacking normal pigmentation. The absence of pigment is observed in the body covering (skin, hair, and feathers) and in the iris of the eye. The...

Mourou, Gérard Albert

(Encyclopedia)Mourou, Gérard Albert, 1944–, French physicist, Ph.D. Pierre and Marie Curie Univ. (now part of Sorbonne Univ.), 1973. Mourou was a professor at the Univ. of Rochester, New York, from 1977 to 1988,...

cataract

(Encyclopedia)cataract, in medicine, opacity of the lens of the eye, which impairs vision. In the young, cataracts are generally congenital or hereditary; later they are usually the result of degenerative changes b...

Ramazzini, Bernardino

(Encyclopedia)Ramazzini, Bernardino bārnärdēˈnō rämät-tsēˈnē [key], 1633–1717, Italian physician. He was professor at Modena (1682–1700) and at Padua until 1714. He is often called the father of indus...

Joinville, Jean, sire de

(Encyclopedia)Joinville, Jean, sire de zhäN sēr də zhwăNvēlˈ [key], 1224?–1317?, French chronicler, biographer of Louis IX of France (St. Louis). As seneschal (governor) of Champagne, Joinville was a close ...

Noland, Kenneth

(Encyclopedia)Noland, Kenneth nōˈlənd [key], 1924–2010, American painter, b. Asheville, N.C. An outstanding colorist, Noland was one of the best-known exponents of the abstract painting movement known as color...