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Ramaphosa, Cyril

(Encyclopedia)Ramaphosa, Cyril (Matamela Cyril Ramaphosa), 1952–, South African political leader, b. Johannesburg. A lawyer, he became involved in the antiapartheid Black Consciousness Movement while a university...

National Radio Astronomy Observatory

(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

temporary worker

(Encyclopedia)temporary worker, an employee, hired through a specialized employment agency, who generally works less than a year on one assignment, regardless of the number of hours worked per week. Temporary worke...

Beck, Aaron Tempkin

(Encyclopedia) Beck, Aaron Tempkin, 1921-2021, American psychiatrist, b. Providence, R.I., Brown Univ. (B.A., 1942), Yale Univ. (M.D., 1946). Following earning his me...

Schoolcraft, Henry Rowe

(Encyclopedia)Schoolcraft, Henry Rowe, 1793–1864, American ethnologist, b. near Albany, N.Y. He gave enormous impetus to the study of Native American culture and may be regarded as the foremost pioneer in Native ...

confession

(Encyclopedia)confession, in law, the formal admission of criminal guilt, usually obtained in the course of examination by the police or prosecutor or at trial. For a confession to be admissible as evidence against...

copernicium

(Encyclopedia)copernicium, artificially produced radioactive chemical element; symbol Cn; at. no. 112; mass number of most stable isotope 285; m.p., b.p., sp. gr., and valence unknown. Situated in Group 12 of the p...

glycol

(Encyclopedia)glycol glīˈkōl [key], dihydric alcohol in which the two hydroxyl groups are bonded to different carbon atoms; the general formula for a glycol is (CH2)n(OH)2. The most important glycol is the simpl...

Dewey, George

(Encyclopedia)Dewey, George do͞oˈē, dyo͞oˈ– [key], 1837–1917, American admiral, hero of the battle of Manila, b. Montpelier, Vt., grad. Annapolis, 1858. He saw active duty in the Civil War and rose in the ...

diphtheria

(Encyclopedia)diphtheria dĭfthērˈēə [key], acute contagious disease caused by Corynebacterium diphtheriae (Klebs-Loffler bacillus) bacteria that have been infected by a bacteriophage. It begins as a soreness o...