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shock wave

(Encyclopedia)shock wave, wave formed of a zone of extremely high pressure within a fluid, especially the atmosphere, that propagates through the fluid at a speed in excess of the speed of sound. A shock wave is ca...

Gloucester, city, England

(Encyclopedia)Gloucester glŏsˈtər, glôˈstər [key], city and district, Gloucestershire, W central England, on the ...

Everett

(Encyclopedia)Everett. 1 City (2020 pop. 49,075), Middlesex co., E Mass., an industrial suburb of Boston, on the Mystic River; settled c.1643, set off ...

turn and bank indicator

(Encyclopedia)turn and bank indicator, aircraft instrument containing one indicator to show turning, or rotation about the vertical axis, and another to show banking, or rotation about the longitudinal axis. The tw...

Howard Hughes Medical Institute

(Encyclopedia)Howard Hughes Medical Institute, (HHMI), nonprofit medical research organization founded in 1953 by Howard Hughes and largly funded from proceeds of the 1984–85 sale of Hughes Aircraft. Headquartere...

Indio

(Encyclopedia)Indio ĭnˈdē-ōˌ [key], city (2020 pop. 89,137), Riverside co., SE Calif., in the Coachella Valley of the Colorado...

Karman, Theodor von

(Encyclopedia)Karman, Theodor von tāˈōdôrˌ fôn kärˈmän [key], 1881–1963, American aeronautical engineer, b. Hungary, grad. Royal Technical Univ., Budapest (1902), and Univ. of Göttingen, Germany (Ph.D.,...

photonics

(Encyclopedia)photonics, the science and technology based on and concerned with the controlled flow of photons, or light particles. It is the optical equivalent of electronics, and the two technologies coexist in s...

carburetor

(Encyclopedia)carburetor kärˈbyərāˈtər, –bə– [key], part of a gasoline engine in which liquid fuel is converted into a vapor and mixed with a regulated amount of air for combustion in the cylinders. Land...

Portsmouth, cities, United States

(Encyclopedia)Portsmouth. 1 City (1990 pop. 25,925), Rockingham co., SE N.H., a port of entry with a good harbor and a state-owned port terminal at the mouth of the Piscataqua River opposite Kittery, Maine; inc. 16...