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thrombolytic drug

(Encyclopedia)thrombolytic drug thrŏmˌbəlĭtˈĭk [key] or clot-dissolving drug, substance, such as streptokinase or tissue plasminogen activator (tPA), that causes the breakdown of blood clots (see thrombosis) ...

dative

(Encyclopedia)dative dāˈtĭv [key] [Lat.,=giving], in Latin grammar, the case typically used to refer to an indirect object, i.e., a secondary recipient of an action. For example, him in I gave him a book is tran...

Cleveland, Frederick Albert

(Encyclopedia)Cleveland, Frederick Albert, 1865–1946, American economist, b. Sterling, Ill., studied at DePauw Univ. and at the Univ. of Chicago, Ph.D. Univ. of Pennsylvania, 1900. He taught at the Univ. of Penns...

Niobrara

(Encyclopedia)Niobrara nīəbrârˈə [key], river, c.430 mi (690 km) long, rising in the High Plains, E Wyo., and flowing E across N Nebraska to the Missouri River on Nebraska's northeast border. The Mirage Flats ...

Moore, Barrington

(Encyclopedia)Moore, Barrington, 1913–2005, American sociologist and political scientist. Moore wrote a number of books on historical sociology that focus on Soviet society. Based at the Russian Research Center a...

Nestroy, Johann Nepomuk

(Encyclopedia)Nestroy, Johann Nepomuk yōˈhän nāˈpōmo͝ok nĕsˈtroi [key], 1802–62, Austrian dramatist and actor. A successful performer in comedies and operettas, he later proved himself a brilliant writer...

melamine

(Encyclopedia)melamine mĕlˈəmēnˌ [key], common name for 2,4,6-triamino-1,3,5-triazine. Melamine is a trimer (see polymer) of cyanamide, H2NC≡N, and is synthesized from calcium carbide. It condenses with form...

pellagra

(Encyclopedia)pellagra pəlăgˈrə [key], deficiency disease due to a lack of niacin (nicotinic acid), one of the components of the B complex vitamins in the diet. Niacin is plentiful in yeast, organ meats, peanut...

radiology

(Encyclopedia)radiology, branch of medicine specializing in the use of X rays, gamma rays, radioactive isotopes, and other forms of radiation in the diagnosis and treatment of disease. X ray machines and fluoroscop...

rare earths

(Encyclopedia)rare earths, in chemistry, oxides of the rare-earth metals. They were once thought to be elements themselves. They are widely distributed in the earth's crust and are fairly abundant, although they we...