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National Dialogue Quartet
(Encyclopedia)National Dialogue Quartet, informal grouping of four Tunisian civil society organizations formed in mid-2013 to facilitate political dialogue in Tunisia that would lead to consensus on the adoption of...octane number
(Encyclopedia)octane number, figure of merit representing the resistance of gasoline to premature detonation when exposed to heat and pressure in the combustion chamber of an internal-combustion engine. Such detona...Obregón, Álvaro
(Encyclopedia)Obregón, Álvaro älˈvärō ōbrāgōnˈ [key], 1880–1928, Mexican general and president (1920–24). A planter in Sonora, he supported Francisco I. Madero in the revolution against Porfirio Díaz...mineral
(Encyclopedia)mineral, inorganic substance occurring in nature, having a characteristic and homogeneous chemical composition, definite physical properties, and, usually, a definite crystalline form. A few of the mi...miniature painting
(Encyclopedia)miniature painting [Ital.,=artwork, especially manuscript initial letters, done with the red lead pigment minium; the word originally had no implication as to size]. In a general sense the term denote...Mühlenberg, Heinrich Melchior
(Encyclopedia)Mühlenberg, Heinrich Melchior myo͞oˈlənbûrg [key], 1746–1807, American clergyman, Revolutionary officer, and legislator, eldest son of Heinrich, was born in Trappe, Pa., and studied at Halle. A...mammary gland
(Encyclopedia)mammary gland, organ of the female mammal that produces and secretes milk for the nourishment of the young. A mammal may have from 1 to 11 pairs of mammary glands, depending on the species. Generally,...photoelectric effect
(Encyclopedia)photoelectric effect, emission of electrons by substances, especially metals, when light falls on their surfaces. The effect was discovered by H. R. Hertz in 1887. The failure of the classical theory ...Chen Shui-bian
(Encyclopedia)Chen Shui-bian chŭn shwā-byän [key], 1951–, Taiwanese political leader, president of Taiwan (2000–2008). Born into poverty, he obtained his law degree from National Taiwan Univ. in 1975 and pra...Coahuila
(Encyclopedia)Coahuila kōäwēˈlä [key], state, 58,067 sq mi (150,394 sq km), N Mexico, on the northward ...Browse by Subject
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