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ultraviolet radiation

(Encyclopedia)ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hert...

Doniphan, Alexander William

(Encyclopedia)Doniphan, Alexander William dŏnˈĭfən [key], 1808–87, American lawyer and soldier, b. Mason co., Ky. He began (1830) to practice law in Lexington, Mo., and served three terms in the state legisla...

Cohen, Leonard Norman

(Encyclopedia)Cohen, Leonard Norman, 1934–2016, Canadian songwriter, singer, and poet, b. Montreal, B.A. McGill Univ., 1955. He initially wrote poetry, publishing his first collection, Let Us Compare Mythologies,...

Tristram and Isolde

(Encyclopedia)Tristram and Isolde trĭsˈtrəm, ĭsōlˈdə, ĭzōlˈ– [key], medieval romance. The earliest extant version (incomplete) was written (c.1185) by Thomas of Britain in Anglo-Norman French verse. Abo...

relocation center

(Encyclopedia)relocation center, in U.S. history, camp in which Japanese and Japanese-Americans were interned during World War II. Fearing a Japanese invasion, the military leaders, under authority of an executive ...

Ray, Satyajit

(Encyclopedia)Ray, Satyajit sätyäˈjĭt rī, rā [key], 1921–92, Indian film director, b. Calcutta (now Kolkata). His subtle, austere, and delicately lyrical films made him one of the outstanding filmmakers of ...

Simon, Paul

(Encyclopedia)Simon, Paul, 1941–, American singer, songwriter, and guitarist, b. Newark, N.J. A polished and intelligent folk-rock lyricist and performer, he first gained fame as half of Simon and Garfunkel (with...

airship

(Encyclopedia)airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola accommodating pa...

Catalan literature

(Encyclopedia)Catalan literature, like the Catalan language, developed in close connection with that of Provence. In both regions the rhymed songs of the troubadours flourished as an art form from the 11th to the 1...

pigmentation

(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...