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directing

(Encyclopedia)directing, the art of leading dramatic performances on the stage or in films. The modern theatrical director is in complete charge of all the artistic aspects of a dramatic presentation. It is the dir...

bacteria

(Encyclopedia)bacteria [pl. of bacterium], microscopic unicellular prokaryotic organisms characterized by the lack of a membrane-bound nucleus and membrane-bound organelles. Once considered a part of the plant king...

Czechoslovakia

(Encyclopedia)CE5 Czechoslovakia chĕsˈkōslōvĕnˌskō [key], former federal republic, 49,370 sq mi (127,869 sq km), in central Europe. On Jan. 1, 1993, the Czech Republic and the Slovak Republic (see Slovaki...

biography

(Encyclopedia)biography, reconstruction in print or on film, of the lives of real men and women. Together with autobiography—an individual's interpretation of his own life—it shares a venerable tradition, meeti...

atom

(Encyclopedia)CE5 Bohr-Rutherford atom CE5 Probability distribution of the electron in the hydrogen atom: A. Ground state B. Highly excited state atom [Gr.,=uncuttable (indivisible)], basic unit of matte...

particle accelerator

(Encyclopedia)CE5 Linear accelerator (LINAC) CE5 Cyclotron: As the charged particles move faster, they spiral out to the edge of the Ds. particle accelerator, apparatus used in nuclear physics to produce bea...

Rousseau, Jean Jacques

(Encyclopedia)Rousseau, Jean Jacques ro͞osōˈ [key], 1712–78, Swiss-French philosopher, author, political theorist, and composer. Rousseau's influence on posterity has been equaled by only a few, and it is...

Echinodermata

(Encyclopedia)CE5 Internal anatomy of a sea star, representative of the phylum Echinodermata Echinodermata əkīˌnōdûrˈmətə [key] [Gr.,=spiny skin], phylum of exclusively marine bottom-dwelling invertebra...

Greenland

(Encyclopedia)Greenland, Green. Kalaallit Nunaat, Dan. Grønland, the largest island in the world (2015 est. pop. 56,000), 836,109 sq mi (2,166,086 sq km), self-governing overseas administrative division of Denmark...

Italian literature

(Encyclopedia)Italian literature, writings in the Italian language, as distinct from earlier works in Latin and French. In the second half of the 19th cent. Francesco De Sanctis, literary critic and historian, la...