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respiration

(Encyclopedia)CE5 Respiratory system respiration, process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is tran...

Mars, in astronomy

(Encyclopedia)Mars, in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth. Mars has two natural satellites, discovered by Asaph Hall in 1877. The innermost of these, Phobos...

astronomy

(Encyclopedia)astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large. ...

fire fighting

(Encyclopedia)fire fighting, the use of strategy, personnel, and apparatus to extinguish, to confine, or to escape from fire. Ancient Rome is known to have had a fire department consisting by the 1st cent. of app...

gem, ornamental mineral or organic substance

(Encyclopedia)gem, commonly, a mineral or organic substance, cut and polished and used as an ornament. Gems also are used as seals (items of assurance) and as talismans (good-luck charms). For birthstones, see mont...

Beijing

(Encyclopedia)Beijing pē-kĭng, pā– [key], city and independent municipality (2021 est. pop. 20,897,000), ...

geography

(Encyclopedia)geography, the science of place, i.e., the study of the surface of the earth, the location and distribution of its physical and cultural features, the areal patterns or places that they form, and the ...

Bonaparte

(Encyclopedia)Bonaparte bwōnäpärˈtā [key], family name of Napoleon I, emperor of the French. Of the second generation of the family the most important was Louis Bonaparte's son, Louis Napoleon, who became e...

comedy

(Encyclopedia)comedy, literary work that aims primarily to provoke laughter. Unlike tragedy, which seeks to engage profound emotions and sympathies, comedy strives to entertain chiefly through criticism and ridicul...

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...