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Ronaldinho
(Encyclopedia)Ronaldinho (Ronaldo Assis de Moreira), 1980–, Brazilian soccer player. Also nicknamed “El Gaucho,” the agile attacking forward was a footballer from childhood. Known almost as much for his sunny...lubrication
(Encyclopedia)lubrication, introduction of a substance between the contact surfaces of moving parts to reduce friction and to dissipate heat. A lubricant may be oil, grease, graphite, or any substance—gas, liquid...swimming
(Encyclopedia)swimming, self-propulsion through water, often as a form of recreation or exercise or as a competitive sport. It is mentioned in many of the classics in connection with heroic acts or religious rites....shorthand
(Encyclopedia) CE5 Shorthand systems shorthand, any brief, rapid system of writing that may be used in transcribing, or recording, the spoken word. Such systems, many having characters based on the letters of th...submarine
(Encyclopedia)submarine, naval craft capable of operating for an extended period of time underwater. Submarines are almost always warships, although a few are used for scientific, business, or other purposes (see a...control systems
(Encyclopedia)control systems, combinations of components (electrical, mechanical, thermal, or hydraulic) that act together to maintain actual system performance close to a desired set of performance specifications...Jomini, Antoine Henri
(Encyclopedia)Jomini, Antoine Henri äNtwänˈ äNrēˈ zhômēnēˈ [key], 1779–1869, Swiss general and military writer. He organized (1799) the militia of the Helvetic Republic and after 1804 served as staff of...electron-volt
(Encyclopedia)electron-volt, abbr. eV, unit of energy used in atomic and nuclear physics; 1 electron-volt is the energy transferred in moving a unit charge, positive or negative and equal to that charge on the elec...tobogganing
(Encyclopedia)tobogganing, sport of coasting down snowy hillsides or chutes on a toboggan, a flat-bottomed vehicle made of hard wood. The toboggan, typically measuring 1.5 ft by 6–8 ft (.46 m by 1.8–2.4 m), is ...snowshoes
(Encyclopedia)snowshoes, footgear enabling the wearer to walk on soft snow without sinking. A snowshoe consists of a light frame of tough wood or aluminum, roughly the shape of a large tennis racket, which is strun...Browse by Subject
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