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spasm

(Encyclopedia)spasm, involuntary rigid muscle contraction, often persistent and often accompanied by pain. It usually has some underlying physical cause such as disease, strain, or injury to the muscle or nearby ti...

Prelog, Vladimir

(Encyclopedia)Prelog, Vladimir vlädyēˈmĭr prāˈlôg [key], 1906–98, Swiss chemist, b. Sarejevo, Austria-Hungary (now in Bosnia and Herzegovina). Educated in Prague, he worked in Yugoslavia until the German i...

e, in mathematics

(Encyclopedia)e, in mathematics, irrational number occurring widely in mathematics and science, approximately equal to the value 2.71828; it is the base of natural, or Naperian, logarithms. The number e is defined ...

Fahrenheit temperature scale

(Encyclopedia)Fahrenheit temperature scale fârˈənhītˌ [key], temperature scale in which the temperature difference between two reference temperatures, the melting and boiling points of water, is divided into 1...

hydrazine

(Encyclopedia)hydrazine hīˈdrəzēnˌ [key], chemical compound, formula NH2NH2, m.p. 1.4℃, b.p. 113.5℃, specific gravity 1.011 at 15℃. It is very soluble in water and soluble in alcohol. At ordinary tempera...

government

(Encyclopedia)government, system of social control under which the right to make laws, and the right to enforce them, is vested in a particular group in society. There are many classifications of government. Accord...

Melbourne, city, Australia

(Encyclopedia)Melbourne, city (2016 pop. 47,285, Greater Melbourne 2016 pop. 4,485,211), capital of Victoria, SE Australia, on Port Phillip Bay at the mouth of the Yarra River. Melbourne, Australia's second largest...

liqueur

(Encyclopedia)liqueur lĭkûrˈ [key], strong alcoholic beverage made of almost neutral spirits, flavored with herb mixtures, fruits, or other materials, and usually sweetened. The name derives from the Latin word ...

Taine, Hippolyte Adolphe

(Encyclopedia)Taine, Hippolyte Adolphe tān, Fr. ēpôlētˈ ädôlfˈ tĕn [key], 1828–93, French critic and historian. A brilliant student, he gained recognition with the publication of his doctoral thesis, Ess...

pi

(Encyclopedia)pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416. It is of great importance in...