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Hydra, in astronomy

(Encyclopedia)Hydra, in astronomy, southern constellation lying S of Corvus, Crater, Virgo, Leo, and Cancer. It is a long, slender, winding constellation traditionally depicted as a snake and known also as the Wate...

Praesepe

(Encyclopedia)Praesepe prēsēˈpē [key] [Lat.,=manger], open star cluster in the constellation Cancer; cataloged as M44 or NGC 2632. It was first recorded by Hipparchus (c.150 b.c.). The cluster is often called t...

chemotherapy

(Encyclopedia)chemotherapy kēˌmōthĕrˈəpē [key], treatment of disease with chemicals or drugs. One chemotherapeutic approach is the development of selectively toxic substances, i.e., substances that can destr...

Love Canal

(Encyclopedia)Love Canal, section of Niagara Falls, N.Y., that formerly contained a canal that was used as chemical disposal site. In the 1940s and 50s the empty canal was used by a chemical and plastics company to...

lymphoma

(Encyclopedia)lymphoma, a cancer of the tissue of the lymphatic system. There are two categories of lymphomas. One type is termed Hodgkin's disease, the other, non-Hodgkin's lymphoma (see lymphoma, non-Hodgkin's). ...

Tasmanian devil

(Encyclopedia)Tasmanian devil, extremely voracious marsupial, or pouched mammal, of the dasyure family, now found only on the island of Tasmania. The Tasmanian devil, Sarcophilus harrisi, formerly found also in Aus...

Warburg, Otto Heinrich

(Encyclopedia)Warburg, Otto Heinrich ŏtˈō hīnˈrĭkh värˈbo͝orkh [key], 1883–1970, German physiologist. He was director (1931–53) of the Kaiser Wilhelm Institute (now Max Planck Institute) for cell physi...

Uppsala, University of

(Encyclopedia)Uppsala, University of, at Uppsala, Sweden; founded 1477 by Sten Sture, the Elder, and Archbishop Jakob Ulvsson. Its activities were suspended in 1510 as a result of religious disputes. It was reorgan...

Sloan, Alfred Pritchard, Jr.

(Encyclopedia)Sloan, Alfred Pritchard, Jr., 1875–1966, American businessman and philanthropist, b. New Haven, Conn., grad. Massachusetts Institute of Technology, 1895. He began his career as a draftsman for the H...

birthmark

(Encyclopedia)birthmark, pigmented maldevelopment of the skin that varies in size, either present at birth or developing later. Birthmarks may appear as moles (melanocytic nevi) that vary in color from light brown ...