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chlorophyll

(Encyclopedia)CE5 chlorophyll klôrˈəfĭlˌ [key], green pigment that gives most plants their color and enables them to carry on the process of photosynthesis. Chemically, chlorophyll has several similar forms...

clipper

(Encyclopedia)clipper, type of sailing ship, designed for speed. Long and narrow, the clipper had the greatest beam aft of the center; the bow cleaved the waves; and the ship carried, besides topgallant and royal s...

analog-to-digital conversion

(Encyclopedia)analog-to-digital or A/D conversion, the process of changing continuously varying data, such as voltage, current, or shaft rotation, into discrete digital quantities that represent the magnitude of th...

truck

(Encyclopedia)truck, automotive vehicle designed primarily for the transportation of goods. A truck is constructed on the general lines of the automobile but uses larger and heavier parts. It may be powered by a ga...

cane, walking stick

(Encyclopedia)cane, walking stick. Probably used first as a weapon, it gradually took on the symbolism of strength and power and eventually authority and social prestige. Ancient Egyptian rulers carried the symboli...

Avebury

(Encyclopedia)Avebury āˈbərē [key], village, Wiltshire, S central England. The village, with a medieval church and Elizabethan manor house, lies within Avebury Circle, a Neolithic circular group of upright ston...

monetarism

(Encyclopedia)monetarism, economic theory that monetary policy, or control of the money supply, is the primary if not sole determinant of a nation's economy. Monetarists believe that management of the money supply ...

Rapallo, Treaty of, 1922

(Encyclopedia)Rapallo, Treaty of, 1922, agreement signed by Germany and the USSR at Rapallo, Italy. It was reached by Walter Rathenau and G. V. Chicherin independently of the Conference of Genoa (see Genoa, Confere...

Paul the Deacon

(Encyclopedia)Paul the Deacon, c.725–799?, Lombard historian. He received a good education, probably at Pavia, and he learned Latin thoroughly and some Greek. He lived at Monte Cassino and at Charlemagne's court....

Cluny Museum

(Encyclopedia)Cluny Museum, 14th- and 15th-century Gothic and Renaissance structure in Paris, built by Pierre de Chaslus, abbot of Cluny, and rebuilt by Jacques d'Ambroise. The site is that of the ancient Roman bat...