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Ahuachapán

(Encyclopedia)Ahuachapán äwä chä pänˈ [key], city, W El Salvador, near the Guatemalan border. It is the westernmost city in the country and is the center of an agricultural region...

Qa'em Shahr

(Encyclopedia)Qa'em Shahr käˈĕm shär [key], city (1991 pop. 123,684), Mazandaran prov., N Iran. Manufactures include textiles and food products; a thermal power plant is there. It is a road and rail transport c...

commando

(Encyclopedia)commando, small, elite military raiding and assault unit or soldier. Although the word was coined in the Boer War (1899–1902), the role is as old as battles themselves. In 1940, when the British org...

Brownian movement

(Encyclopedia)Brownian movement or motion, zigzag, irregular motion exhibited by minute particles of matter when suspended in a fluid. The effect has been observed in all types of colloidal suspensions (see colloid...

quasicrystal

(Encyclopedia)quasicrystal kwāˈzīkrĭsˌtəl, kwäzˈē– [key] or quasiperiodic solid, solid body that exhibits such crystalline features as symmetry and repeating patterns of unit cells (regular arrangements ...

Comilla

(Encyclopedia)Comilla kōmĭlˈə [key], city, E Bangladesh, on the Gumti River. An administrative center on ...

gram

(Encyclopedia)gram, abbr. g, unit of mass equal to 0.001 kilogram, the basic unit of mass in the metric system. The gram is the unit of mass in the cgs system. It is approximately equal to 0.035 avoirdupois ounce, ...

radiometer

(Encyclopedia)radiometer rāˌdēŏmˈətər [key], instrument for detection or measurement of electromagnetic radiation; the term is applied in particular to devices used to measure infrared radiation. One of the ...

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