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Kekulé von Stradonitz, Friedrich August

(Encyclopedia)Kekulé von Stradonitz, Friedrich August frēˈdrĭkh ouˈgo͝ost kāˈko͞olā fən shträˈdōnĭts [key], 1829–96, German organic chemist. He was professor at Ghent (1858–65) and at Bonn from 1...

Brill, Abraham Arden

(Encyclopedia)Brill, Abraham Arden, 1874–1948, American psychiatrist, b. Austria, grad. New York Univ., 1901, M.D. Columbia, 1903. He came to the United States alone at the age of 13. After studies with C. G. Jun...

weak interactions

(Encyclopedia)weak interactions, actions between elementary particles mediated, or carried, by W and Z particles and that are responsible for nuclear decay. Weak interactions are one of four fundamental interaction...

Boole, George

(Encyclopedia)Boole, George, 1815–64, English mathematician and logician. He became professor at Queen's College, Cork, in 1849. Boole wrote An Investigation of the Laws of Thought (1854) and works on calculus an...

Franciscans

(Encyclopedia)Franciscans frănsĭsˈkənz [key], members of several Roman Catholic religious orders following the rule of St. Francis (approved by Honorius III, 1223). There are now three organizations of Francisc...

concordat

(Encyclopedia)concordat kənkôrˈdăt [key], formal agreement, specifically between the pope, in his spiritual capacity, and the temporal authority of a state. Its juridical status is now generally accepted as bei...

abacus, in architecture

(Encyclopedia)abacus ăbˈəkəs [key], in architecture, flat slab forming the top member of a capital. In classical orders it varies from a square form having unmolded sides in the Greek Doric, to thinner proporti...

Ulloa, Francisco de

(Encyclopedia)Ulloa, Francisco de ᵺā o͞olyōˈä [key], d. c.1540, Spanish explorer in Mexico. Against the orders of Viceroy Antonio de Mendoza, Hernán Cortés sent Ulloa to explore the Gulf of California. In...

Hercules'-club

(Encyclopedia)Hercules'-club, common name for several small, thorny trees, chiefly the devil's-walking-stick of the family Aralaceae (ginseng family) and the prickly ash of the family Rutaceae (orange family). The ...

neurasthenia

(Encyclopedia)neurasthenia nyo͝orˌəsthēˈnēa [key], condition characterized by general lassitude, irritability, lack of concentration, worry, and hypochondria. The term was introduced into psychiatry in 1869 b...