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cryosurgery

(Encyclopedia)cryosurgery krīˈōsrˌjərē [key], bloodless surgical technique using a supercooled probe to destroy diseased or superfluous tissue. Liquid nitrogen circulating through the instrument cools it to t...

Airy, Sir George Biddell

(Encyclopedia)Airy, Sir George Biddell, 1801–92, English astronomer. The son of a poor farmer, he distinguished himself as Senior Wrangler at Cambridge, where he was elected fellow of Trinity College (1824) and a...

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...

Leloir, Luis Federico

(Encyclopedia)Leloir, Luis Federico, 1906–87, Argentine biochemist, b. France, M.D. Univ. of Buenos Aires, 1932, Ph.D. Leloir was a researcher at the Univ. of Buenos Aires from 1932 to 1943. He then taught briefl...

morocco, type of leather

(Encyclopedia)morocco, goatskin leather, dyed on the grain side and boarded by hand or machine to bring up the grain in a bird's-eye effect. It probably originated with the Arabs in North Africa as an alum-tanned p...

Emory University

(Encyclopedia)Emory University ĕmˈərē [key], near Atlanta, Ga.; coeducational; United Methodist; chartered as Emory College 1836, opened 1837 at Oxford. It became Emory Univ. in 1915 and in 1919 moved to Atlant...

gnat

(Encyclopedia)gnat, common name for any one of a number of small, fragile-looking two-winged flies of the suborder Nematocera, order Diptera, which includes the families Tipulidae (crane flies), Bibionidae (hairfli...

stroboscope

(Encyclopedia)stroboscope strŏbˈəskōp [key], optical instrument for making a moving object appear to be slowed down or stationary. This effect is created by interrupting the observer's view so that the object i...

Andromeda, in astronomy

(Encyclopedia)Andromeda, in astronomy, northern constellation located to the NE of Pegasus and to the S of Cassiopeia. Its brightest star, Alpheratz (Alpha Andromedae), marks the northeast corner of the Great Squar...

Newcastle disease

(Encyclopedia)Newcastle disease, pneumoencephalitis, acute viral disease of domestic poultry. Newcastle disease is characterized by sneezing, coughing, and nervous behavior. Affected birds may show tremors, circlin...