Unani medicine, also known as yunani tibb or Greco-Islamic medicine, is a therapeutic system used in South and Southwest Asia that developed through the interaction of ancient Greek with some Arab and, perhaps, Ayurvedic medical and pharma...

Uncertainty in statistics is measured by the amount of error in an estimate of the mean or average value of a population. The sample mean is the average of a group of measurements or parameters taken from the population, and the standard...

(born Oct. 7, 1870, Smart Station, Warren county, Tenn., U.S.—died March 22, 1952, Readyville, Tenn.) U.S. country music singer and banjo player. He grew up in Nashville, where his parents ran a hotel that catered to traveling perfor...

Harriet Beecher Stowe's melodramatic novel, Uncle Tom's Cabin, which she called in the preface a "series of sketches", was written "to awaken sympathy and feeling for the African race" (Stowe "Preface"). It was so successful as a polemic a...

An unconformity is a stratigraphic feature that is formed by broad erosion of an area causing a significant gap to occur in the stratigraphic record. Generally, development of an unconformity is accompanied by or preceded by uplift of the ...

Under Milk Wood by Dylan Thomas Dylan Thomas (1914-53), Wales’s most renowned modern poet, was born in the seaport town of Swansea on the southern Welsh coast. From his father, a school teacher with literary interests and atheistic b...

Underground Comics (or "Comix," with the X understood to signify X-rated material) include strips and books heavily dosed with obscenity, graphic sex, gory violence, glorification of drug use, and general defiance of conventi...

Understand This by Jervey Tervalon Jervey Tervalon's family moved from New Orleans, Louisiana, to Los Angeles, California, when he was four years old. They settled among other working and middle-class black families in a community-oriented,...

English engineer and amateur photographer William Thompson devised the first method of taking underwater photographs in 1856. As he watched a swollen river sweep beneath a bridge during a rainstorm, he wondered how photography might be use...

the condition of one who is capable of working, actively seeking work, but unable to find any work. It is important to note that to be considered unemployed a person must be an active member of the labour force and in search of remunerativ...

Located on the Malay Peninsula in Southeast Asia, the Unfederated Malay States (UMS), were Johor, Kedah, Perlis, Kelantan, and Terengganu. The main difference between the five UMS and the four Federated Malay States (FMS) was that British ...

International character-encoding system designed to support the electronic interchange, processing, and display of the written texts of the diverse languages of the modern and classical world. The Unicode Worldwide Character Standard inclu...

Religious movement founded (1954) in South Korea by Sun Myung Moon. Influenced by yin-yang principles and Korean shamanism, it seeks to establish divine rule on earth through the restoration of the family, based on the union of the Lord an...

A state transition diagram is a graphical representation of the states of an object as well as the transitions the object may pass through during its lifetime. State transition diagrams are used in object-oriented modeling and design to re...

Uniform Commercial Code The Uniform Commercial Code (UCC) is a collection of recommended laws covering many different issues that arise during commercial transactions, such as sales contracts, leases, negotiable instruments, letters of cre...

The concept of uniformitarianism is commonly oversimplified in geological textbooks as "the present is a guide to interpreting the past" (or words to that effect). This explanation, however, is not correct about the true mean...

The first action of naval warfare in the American Civil War was the blockade of Southern ports by the Union Navy. Starting on April 19, 1861, the blockade was part of General Winfield Scott's strategy called the Anaconda Plan, which...

(2002 est. pop. 14 million). India's third-largest city (after Calcutta and Mumbai) and a union territory, Delhi has served as the capital of various regimes for over ten centuries. Jawaharlal Nehru (1889–1964), India'...

Unita Blackwell Born March 18, 1933 Lula, Mississippi Mayor and civil rights activist Unita Blackwell was inspired to join the civil rights movement in the early 1960s by student activists. She registered voters, helped found the Mississipp...

federation of seven emirates along the eastern coast of the Arabian Peninsula. The largest of these emirates, Abū &Zsubdot;aby (Abu Dhabi), which comprises more than three-fourths of the federation's total land area, is the centre of...

U.S.-based industrial union representing automotive and other vehicular workers in the U.S., Canada, and Puerto Rico. The UAW was founded in Detroit, Mich., in 1935, when the Committee for Industrial Organization (&see; AFL-CIO) began to o...

In 1973, the Indonesian New Order government of Suharto merged all existing political parties into two parties—the Partai Demokrasi Indonesia (PDI; Indonesian Democratic Party) and the Partai Persatuan Pembangunan (PPP; United Devel...

The United Front strategy grew from the belief of the Soviet Comintern, or international organization of Communist parties, that Communist groups in nations subject to foreign subjugation should form a united front with nationalists to ga...

island country located off the northwestern coast of mainland Europe. The United Kingdom comprises the whole of the island of Great Britain—which contains England, Wales, and Scotland—as well as the northern portion of the isla...

U.S. labour union. Founded in 1890, the UMWA grew rapidly under the leadership of John Mitchell (president 1898–1908) despite determined opposition from coal-mine operators. By 1920, when John L. Lewis took over, the union had half a...