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crystal

(Encyclopedia)CE5 Types of crystal crystal, a solid body bounded by natural plane faces that are the external expression of a regular internal arrangement of constituent atoms, molecules, or ions. The formation...

postmodernism

(Encyclopedia)postmodernism, term used to designate a multitude of trends—in the arts, philosophy, religion, technology, and many other areas—that come after and deviate from the many 20th-cent. movements that ...

psychiatry

(Encyclopedia)psychiatry səkīˈətrē, sī– [key], branch of medicine that concerns the diagnosis and treatment of mental, emotional, and behavioral disorders, including major depression, schizophrenia, and anx...

Hellenistic civilization

(Encyclopedia)Hellenistic civilization. The conquests of Alexander the Great spread Hellenism immediately over the Middle East and far into Asia. After his death in 323 b.c., the influence of Greek civilization con...

Confederation, Articles of

(Encyclopedia)Confederation, Articles of, in U.S. history, ratified in 1781 and superseded by the Constitution of the United States in 1789. The imperative need for unity among the new states created by the America...

Livingston

(Encyclopedia)Livingston, family of American statesmen, diplomats, and jurists. Edward Livingston,Edward Livingston, 1764–1836, b. Livingston Manor, was the son of Robert R. Livingston (1718–75) and brother o...

embryo

(Encyclopedia)CE5 Development of the human embryo embryo ĕmˈbrēō [key], name for the developing young of an animal or plant. In its widest definition, the embryo is the young from the moment of fertilizatio...

Alberta

(Encyclopedia)CE5 Alberta ălbûrˈtə [key], province, 255,285 sq mi (661,188 sq km), including 6,485 sq mi (16,796 sq km) of water surface, W Canada. Alberta was originally part...

Marine Corps, United States

(Encyclopedia)Marine Corps, United States, military corps that forms a separate service within the U.S. Dept. of the Navy. The commandant of the Marine Corps is a member of the Joint Chiefs of Staff. During conflic...

Revere, Paul

(Encyclopedia)Revere, Paul, 1735–1818, American silversmith and political leader in the American Revolution, b. Boston. In his father's smithy he learned to work gold and silver, and he became a leading silversmi...