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premenstrual syndrome

(Encyclopedia)premenstrual syndrome (PMS), any of various symptoms experienced by women of childbearing age in the days immediately preceding menstruation. It is most common in women in their twenties and thirties....

genro

(Encyclopedia)genro gĕnˈrōˈ [key] [ Jap.,=elder statesmen], a group that exercised collective leadership in Japan from the end of the Meiji period until c.1932. After the Meiji restoration (1868), Westernizer...

Fo, Dario

(Encyclopedia)Fo, Dario, 1926–2016, Italian playwright, actor, and director, b. Leggiuno Sangiano. Fo developed a sharp and irreverent satirical farce influenced by Bertholt Brecht and Antonio Gramsci as well as ...

Commonwealth of Independent States

(Encyclopedia)Commonwealth of Independent States (CIS), community of independent nations established by a treaty signed at Minsk, Belarus, on Dec. 8, 1991, by the heads of state of Russia, Belarus, and Ukraine. Bet...

bureaucracy

(Encyclopedia)bureaucracy byo͝orŏkˈrəsē [key], the administrative structure of any large organization, public or private. Ideally bureaucracy is characterized by hierarchical authority relations, defined spher...

Louisiana Purchase

(Encyclopedia)CE5 Louisiana Purchase (1803) Louisiana Purchase, 1803, American acquisition from France of the formerly Spanish region of Louisiana. Jefferson instructed Livingston to attempt to purchase the �...

nuclear weapons

(Encyclopedia)nuclear weapons, weapons of mass destruction powered by atomic, rather than chemical, processes. Nuclear weapons produce large explosions and hazardous radioactive byproducts by means of either nuclea...

Afghanistan War

(Encyclopedia)Afghanistan War, 1978–92, conflict between anti-Communist Muslim Afghan guerrillas (mujahidin) and Afghan government and Soviet forces. The conflict had its origins in the 1978 coup that overthrew A...

North Atlantic Treaty Organization

(Encyclopedia)North Atlantic Treaty Organization (NATO), established under the North Atlantic Treaty (Apr. 4, 1949) by Belgium, Canada, Denmark, France, Great Britain, Iceland, Italy, Luxembourg, the Netherlands, N...