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Miocene epoch

(Encyclopedia)Miocene epoch mīˈəsēn [key], fourth epoch of the Tertiary period in the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from around 24.6 to 5.1 mill...

Turgot, Anne Robert Jacques

(Encyclopedia)Turgot, Anne Robert Jacques än rōbĕrˈ zhäk türgōˈ [key], 1727–81, French economist, comptroller general of finances (1774–76). The son of a rich merchant, he showed precocious ability at s...

bossism

(Encyclopedia)bossism, in U.S. history, system of political control centering about a single powerful figure (the boss) and a complex organization of lesser figures (the machine) bound together by reciprocity in pr...

bridge, card game

(Encyclopedia)bridge, card game derived from whist, played with 52 cards by four players in two partnerships. Bridge probably originated in the Middle East in the 19th cent. Auction bridge, one form of the game, ...

sovereignty

(Encyclopedia)sovereignty, supreme authority in a political community. The concept of sovereignty has had a long history of development, and it may be said that every political theorist since Plato has dealt with t...

poker

(Encyclopedia)poker, card game, believed to have originated in Asia and first played in the United States in the 19th cent. A traditional cutthroat gambling game at first, it is now also an internationally popular ...

physiocrats

(Encyclopedia)physiocrats fĭzˈēəkrătsˌ [key], school of French thinkers in the 18th cent. who evolved the first complete system of economics. They were also referred to simply as “the economists” or “th...

prion

(Encyclopedia)prion prēˈŏn [key], abnormal form of a protein found in mammals, now generally believed to cause a group of diseases known as prion diseases or transmissible spongiform encephalopathies, which are ...

pigmentation

(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...

oxidation and reduction

(Encyclopedia)oxidation and reduction, complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation was used to re...