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encephalitis

(Encyclopedia)encephalitis ĕnsĕfˌəlīˈtəs [key], general term used to describe a diffuse inflammation of the brain and spinal cord, usually of viral origin, often transmitted by mosquitoes, in contrast to a b...

Huerta, Victoriano

(Encyclopedia)Huerta, Victoriano vēktōryäˈnō [key], 1854–1916, Mexican general and president (1913–14). He served under Porfirio Díaz. After the revolution of Francisco I. Madero (1911) he aided the new p...

Frederick William IV

(Encyclopedia)Frederick William IV, 1795–1861, king of Prussia (1840–61), son and successor of Frederick William III. A romanticist and a mystic, he conceived vague schemes of reform based on a revival of the m...

geode

(Encyclopedia)geode jēˈōd [key], hollow, globular rock nodule ranging in diameter from 1 to 12 in. (2.54–30.5 cm) or more. Most geodes are partly filled with mineral matter; they have a thin layer of chalcedon...

fuse, electric

(Encyclopedia)fuse, electric, safety device used to protect an electric circuit against an excessive current. A fuse consists essentially of a strip of low-melting alloy enclosed in a suitable housing. It is connec...

Gary, Elbert Henry

(Encyclopedia)Gary, Elbert Henry, 1846–1927, American lawyer and industrialist, b. near Wheaton, Ill., grad. Union College of Law, Chicago, 1868. Rising rapidly as a corporation lawyer, he became mayor of Wheaton...

acetylene

(Encyclopedia)acetylene ĕthˈīn [key], HC≡CH, a colorless gas. It melts at −80.8℃ and boils at −84.0℃. Offensive odors often noted in commercial acetylene are due to impurities. Acetylene forms explosiv...

lock, canal

(Encyclopedia)lock, canal, stretch of water enclosed by gates, one at each end, built into a canal or river for the purpose of raising or lowering a vessel from one water level to another. A lock may also be built ...

neostigmine

(Encyclopedia)neostigmine nēˌōstĭgˈmēn, –mĭn [key], drug used to mimic the effects of stimulation of the parasympathetic nervous system. Along with several other drugs that have a similar mode of action, i...

air mass

(Encyclopedia)air mass, large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height. Air masses for...