tonic sol-fa: see musical notation.

sol, in chemistry: see colloid.

Sol, in Roman religion, sun god. An ancient god of Mesopotamian origin, he was introduced (c.220) into Roman religion as Sol Invictus by emperor Heliogabalus. His worship remained an important cult of Rome until the rise of Christianity.

LeWitt, Sol, 1928-2007, American artist, b. Hartford, Conn. LeWitt, who came into prominence in the 1960s, termed his work conceptual art, emphasizing that the idea or concept that animates each work is its most important aspect. He is probably the artist most often linked with the conceptual art movement. Reflecting his study of mathematics, Lewitt reduced the contents of his art to the most basic shapes, colors, and lines, creating modular cubes and grid structures, geometric "wall drawings," and serial graphics. His work is represented in the Museum of Modern Art, New York City, and in other major American museums.

Hurok, Sol, 1888-1974, American impresario, b. Russia. Emigrating to the United States in 1906, Hurok was a peddler, streetcar conductor, bottlewasher, and hardware salesman before becoming the foremost impresario of his age. By his own estimation, he presented more than 4,000 artists and companies, among them Pavlova, Marian Anderson, the Comédie Française, the Old Vic Company, the Royal Ballet, Andrés Segovia, Jean-Louis Barrault, and Victoria de los Angeles. The film Tonight We Sing (1953) was based on his autobiography, Impresario (1946).

Costa del Sol, a strip of coastline, S. Spain, in Andalusia, extending from Motril to Estepona The area has become famous as a Mediterranean coastal resort, and its tourist industry continues to expand.

(born April 9, 1888, Pogar, near Kharkov, Russia—died March 5, 1974, New York, N.Y., U.S.) Russian-born U.S. impresario. He went to the U.S. in 1905 and in 1913 inaugurated the concert series Music for the Masses, which led to his representing many famous eastern European artists when they toured abroad, including Feodor Chaliapin, Mischa Elman, Anna Pavlova, and Artur Rubinstein.

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In Roman religion, the name of two distinct sun gods at Rome. The original Sol, or Sol Indiges, had an annual sacrifice and shrines on the Quirinal and in the Circus Maximus. After the importation of various Syrian sun cults, Elagabalus built a temple to Sol Invictus on the Palatine and attempted to make his worship the principal religion at Rome. Aurelian later reestablished the worship and erected a temple to Sol in the Campus Agrippae. The worship of Sol remained the chief imperial cult until the rise of Christianity.

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