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perpetual-motion machine

(Encyclopedia) perpetual-motion machine, device that would be able to operate continuously and supply useful work, in violation of the laws of thermodynamics. A machine that would produce more energy…

dissociation

(Encyclopedia) dissociation, in chemistry, separation of a substance into atoms or ions. Thermal dissociation occurs at high temperatures. For example, hydrogen molecules (H2) dissociate into atoms (…

Grand Island

(Encyclopedia) Grand Island <1> City (2020 pop. 53,131), seat of Hall co., S Nebr., on the Wood River near its junction with the Platte; settled…

Anderson, Maxwell

(Encyclopedia) Anderson, Maxwell, 1888–1959, American dramatist, b. Atlantic, Pa., grad. Univ. of North Dakota, 1911. His plays, many of which are written in verse, usually concern social and moral…

Johnson, Reverdy

(Encyclopedia) Johnson, Reverdy, 1796–1876, American lawyer and statesman, b. Annapolis, Md. Admitted to the bar in 1816, he served in the Maryland legislature (1821–28) and the U.S. Senate (1845–49…

jeopardy

(Encyclopedia) jeopardy, in law, condition of a person charged with a crime and thus in danger of punishment. At common law a defendant could be exposed to jeopardy for the same offense only once;…

accessory

(Encyclopedia) accessory, in criminal law, a person who, though not present at the commission of a crime, becomes a participator in the crime either before or after the fact of commission. An…

Mboya, Thomas Joseph

(Encyclopedia) Mboya, Thomas JosephMboya, Thomas Josephmboiˈə [key], 1930–69, Kenyan political leader. The son of a Luo farmer, he was born in the “white highlands” of Kenya and educated at Roman…

manslaughter

(Encyclopedia) manslaughter, homicide committed without justification or excuse but distinguished from murder by the absence of the element of malice aforethought. Modern criminal statutes usually…

dimension, in mathematics

(Encyclopedia) dimension, in mathematics, number of parameters or coordinates required locally to describe points in a mathematical object (usually geometric in character). For example, the space we…