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Fizeau, Armand Hippolyte Louis

(Encyclopedia)Fizeau, Armand Hippolyte Louis ärmäNˈ ēpôlētˈ lwē fēzōˈ [key], 1819–96, French physicist. The first to measure (1849) the velocity of light in air, he also determined its speed in water. ...

Franck, James

(Encyclopedia)Franck, James frängk [key], 1882–1964, German physicist. He was professor of physics at Göttingen and at Johns Hopkins (1935–38) and professor of physical chemistry at the Univ. of Chicago from ...

Antoninus, Saint

(Encyclopedia)Antoninus, Saint ăntōnīˈnəs [key], 1389–1459, Italian churchman, b. Antoninus Pierozzi. He was a Dominican and became archbishop of Florence. He ruled well and was renowned for his charitable w...

di Suvero, Mark

(Encyclopedia)di Suvero, Mark dē so͞oˈvərō [key], 1933–, American sculptor, b. Shanghai. Di Suvero's major works are constructions of massize pieces of steel, huge weathered timbers, tires, chains, and rope....

corduroy

(Encyclopedia)corduroy, a cut filling-pile fabric with lengthwise ridges, or wales, that may vary from fine (pinwale) to wide. Extra filling yarns float over a number of warp yarns that form either a plain-weave or...

Clinch

(Encyclopedia)Clinch, river, c.300 mi (480 km) long, formed by the junction of two forks in SW Va., and flowing generally SW across E Tenn. to the Tennessee River at Kingston. Its waters and those of its tributary,...

Thespis

(Encyclopedia)Thespis thĕsˈpĭs [key], fl. 534 b.c., of Icaria in Attica. In Greek tradition, he was the inventor of tragedy. Almost nothing is known of his life or works. He is supposed to have modified the dith...

seeing

(Encyclopedia)seeing, in astronomy, the clarity with which stars and other celestial objects can be observed. It is primarily determined by the atmosphere of the earth. The most obvious phenomenon is twinkling, whe...

plasma

(Encyclopedia)plasma, in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion). It is electrically conductive and is affected by magn...

margin requirement

(Encyclopedia)margin requirement, that part of a security's price that a buyer must pay for in cash. The balance of the price is met by the broker, who, in effect, is supplying a client with a loan. The smaller the...