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automatic tuning control

(Encyclopedia) automatic tuning control (ATC), method or device to keep a radio or television receiver automatically tuned to a desired frequency or channel. Assuming that the receiver is at least…

Genet, Edmond Charles Édouard

(Encyclopedia) Genet, Edmond Charles ÉdouardGenet, Edmond Charles ÉdouardĕdmôNˈ shärl ādwärˈ zhənāˈ [key], 1763–1834, French diplomat, known as Citizen Genet. He had served as a French representative…

ultrasound

(Encyclopedia) ultrasound or sonography, in medicine, technique that uses sound waves to study and treat hard-to-reach body areas. In scanning with ultrasound, high-frequency sound waves are…

Livingstone, David

(Encyclopedia) Livingstone, DavidLivingstone, Davidlĭvˈĭngstən, –stōnˌ [key], 1813–73, Scottish missionary and explorer in Africa, the first European to cross the African continent. From 1841 to 1852…

unemployment

(Encyclopedia) unemployment, condition of one who is able to work but unable to find work. Once assumed to be voluntary, idleness was punishable by law; however it is now recognized that unemployment…

artificial limb

(Encyclopedia) artificial limb, mechanical replacement for a missing limb. An artificial limb, called a prosthesis, must be light and flexible to permit easy movement, but must also be sufficiently…

Harris, Isham Green

(Encyclopedia) Harris, Isham GreenHarris, Isham Greenīˈshəm [key], 1818–97, American political leader, b. Franklin co., Tenn. Admitted to the bar in 1841, he was elected in 1847 to the Tennessee…

Indian Reorganization Act

(Encyclopedia) Indian Reorganization Act, legislation passed in 1934 in the United States in an attempt to secure new rights for Native Americans on reservations. Its main provisions were to restore…

subpoena

(Encyclopedia) subpoenasubpoenasəpēˈnə [key] [Lat.,=under penalty], in law, an order to a witness to appear before a court. A subpoena ad testificandum [Lat.,= to testify under penalty], the…

Rudolf II

(Encyclopedia) Rudolf II, 1552–1612, Holy Roman emperor (1576–1612), king of Bohemia (1575–1611) and of Hungary (1572–1608), son and successor of Holy Roman Emperor Maximilian II. Acceding to the…