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Nizhny Novgorod

(Encyclopedia)Nizhny Novgorod nyēshˈnyī nôfˈgərəd [key], formerly Gorky or Gorki, city (1989 pop. 1,438,000), capital of Nizhny Novgorod region and the administrative center of the Volga federal district, E ...

Tethys , in astronomy

(Encyclopedia)Tethys tēˈthĭs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn III (or S3), Tethys is 659 mi (1060 km) in diameter, orbits Saturn at a mean dista...

drone

(Encyclopedia)drone or remotely piloted vehicle, a pilotless craft guided by remote control. Aircraft, ships, and land vehicles can be designed or outfitted as drones. Underwater vessels—both piloted and pilotles...

Maputo

(Encyclopedia)Maputo məpo͞oˈtō [key], city (1997 pop. 966,837), capital of Mozambique, a port on the Indian Ocean. It is Mozambique's largest city and its administrative, communications, and commercial center. ...

Henry, Joseph

(Encyclopedia)Henry, Joseph, 1797–1878, American physicist, b. Albany, N.Y., educated at Albany Academy. He taught (1826–32) mathematics and natural philosophy at Albany Academy and was professor of natural phi...

Goodyear, Charles

(Encyclopedia)Goodyear, Charles, 1800–1860, American inventor, b. New Haven, Conn., originator of vulcanized rubber. He failed in his earlier business ventures and was in jail for debt when he began his experimen...

dimension, in mathematics

(Encyclopedia)dimension, in mathematics, number of parameters or coordinates required locally to describe points in a mathematical object (usually geometric in character). For example, the space we inhabit is three...

Cabot, John

(Encyclopedia)Cabot, John, fl. 1461–98, English explorer, probably b. Genoa, Italy. He became a citizen of Venice in 1476 and engaged in the Eastern trade of that city. This experience, it is assumed, was the sti...

Medina Sidonia, Alonso Pérez de Guzmán, duque de

(Encyclopedia)Medina Sidonia, Alonso Pérez de Guzmán, duque de älōnˈsō pāˈrĕth thā go͞othmänˈ do͞oˈkā ᵺā māᵺēˈnä sēᵺōˈnyä [key], 1550–1615, Spanish nobleman and commander in chief o...

horsefly

(Encyclopedia)horsefly, common name for the large hairy flies of the family Tabanidae. Male horseflies feed on pollen and nectar, but the females suck blood as well and are common pests of animals and sometimes of ...