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division of labor

(Encyclopedia)division of labor, in economics, the specialization of the functions and roles involved in production. Division of labor is closely tied with the standardization of production, the introduction and pe...

Russian and Soviet Rulers since 1462 (table)

(Encyclopedia)Russian and Soviet Rulers since 1462(including dates of rule) House of Rurik House of Godunov Usurpers House of Romanov Provisional Government(premiers) Soviet Russia (1917–22) and the U...

ethnology

(Encyclopedia)ethnology ĕthnŏlˈəjē [key], scientific study of the origin and functioning of human cultures. It is usually considered one of the major branches of cultural anthropology, the other two being anth...

United Nations Educational, Scientific, and Cultural Organization

(Encyclopedia)United Nations Educational, Scientific, and Cultural Organization (UNESCO), specialized agency of the United Nations, with headquarters in Paris. Its counterpart in the League of Nations was the Inter...

skin cancer

(Encyclopedia)skin cancer, malignant tumor of the skin. The most common types of skin cancer are basal cell carcinoma, squamous cell carcinoma, and melanoma. Rarer forms include mycosis fungoides (a type of lymphom...

Kaplan, Mordecai Menahem

(Encyclopedia)Kaplan, Mordecai Menahem môrˈdĭkīˌ mənäkhˈəm kăpˈlən [key], 1881–1983, American rabbi, educator, and philosopher, b. Lithuania, grad. College of the City of New York, 1900, M.A. Columbia...

Pennsylvania Dutch

(Encyclopedia)Pennsylvania Dutch [Ger. Deutsch=German], people of E Pennsylvania of German descent who migrated to the area in the 18th cent., particularly those in Northampton, Berks, Lancaster, Lehigh, Lebanon, Y...

foot-and-mouth disease

(Encyclopedia)foot-and-mouth disease or hoof-and-mouth disease, highly contagious disease almost exclusive to cattle, sheep, swine, goats, and other cloven-hoofed animals. It is caused by a virus, specifically an a...

rock carvings and paintings

(Encyclopedia)rock carvings and paintings, designs inscribed on rock surfaces and huge stone monuments in many parts of the world by prehistoric or preindustrial peoples. They have been found on every continent and...

perfluoroalkyl and polyfluoroalkyl substances

(Encyclopedia)perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS, which resist w...