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hysteria

(Encyclopedia)hysteria hĭstĕrˈēə [key], in psychology, a disorder commonly known today as conversion disorder, in which a psychological conflict is converted into a bodily disturbance. It is distinguished from...

Abravanel, Judah

(Encyclopedia)Abravanel or Abarbanel, Judah, c.1460–c.1523, Jewish philosopher, physician, and poet, son of Isaac Abravanel, b. Lisbon; he is also known as Leone Ebreo. He fled (1483) from Portugal to Spain with ...

Mach's principle

(Encyclopedia)Mach's principle mäks [key] [for E. Mach], assertion that the inertial effects of mass are not innate in a body, but arise from its relation to the totality of all other masses, i.e., to the universe...

Marcion

(Encyclopedia)Marcion märˈshən, märˈsēən [key], c.85–c.160, early Christian bishop, founder of the Marcionites, one of the first great Christian heresies to rival Catholic Christianity. He was born in Sino...

Rasputin, Grigori Yefimovich

(Encyclopedia)Rasputin, Grigori Yefimovich răspyo͞oˈtĭn, Rus. grĭgôˈrē yĭfēˈməvĭch rəspo͞oˈtyĭn [key], 1869–1916, Russian holy man and courtier, a notorious figure at the court of Czar Nicholas I...

ultrasonics

(Encyclopedia)ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application of sound energy...

Plutarch

(Encyclopedia)Plutarch plo͞oˈtärk [key], a.d. 46?–c.a.d. 120, Greek essayist and biographer, b. Chaeronea, Boeotia. He traveled in Egypt and Italy, visited Rome (where he lectured on philosophy) and Athens, an...

phenothiazine

(Encyclopedia)phenothiazine fēˌnəthīˈəzĭn [key], any one of a class of drugs used to control mental disorders. Phenothiazines, along with other antipsychotic, or neuroleptic, drugs are used for such disorder...

Rousseau, Henri

(Encyclopedia)Rousseau, Henri äNrēˈ ro͞osōˈ [key], 1844–1910, French primitive painter, b. Laval. He was entirely self-taught, and his work remained consistently naive and imaginative. Rousseau was called L...

reservoir

(Encyclopedia)reservoir rĕzˈəvôr, –vwär [key], storage tank or wholly or partly artificial lake for storing water. Building an embankment or dam to preserve a supply of water for irrigation is an ancient pra...