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Macau

(Encyclopedia)Macau or Macao məkouˈ [key], Port. Macau, Mandarin Aomen, special administrative region of China, formerly administered by Portugal (2015 est. pop. 601,000), 10.8 sq mi (28.2 sq km), adjoining Guang...

insulin

(Encyclopedia)insulin, hormone secreted by the β cells of the islets of Langerhans, specific groups of cells in the pancreas. Insufficiency of insulin in the body results in diabetes. Insulin was one of the first ...

dentistry

(Encyclopedia)dentistry, treatment and care of the teeth and associated oral structures. Dentistry is mainly concerned with tooth decay, disease of the supporting structures, such as the gums, and faulty positionin...

dam

(Encyclopedia)dam, barrier, commonly across a watercourse, to hold back water, often forming a reservoir or lake; dams are also sometimes used to control or contain rockslides, mudflows, and the like in regions whe...

Cairo, city, Egypt

(Encyclopedia)Cairo kīˈrō [key], Arab. Al Qahirah, city (2021 est. metro. area pop. 21,323,000), capital...

earthquake

(Encyclopedia)CE5 Worldwide pattern of earthquake activity: The dots indicate the epicenters of all earthquakes recorded during a recent 10-year period. CE5 earthquake, trembling or shaking movement of the ea...

Protestantism

(Encyclopedia)Protestantism, form of Christian faith and practice that originated with the principles of the Reformation. The term is derived from the Protestatio delivered by a minority of delegates against the (1...

aerodynamics

(Encyclopedia)aerodynamics, study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most concerned. Although aerodynamics is primar...

Brooklyn

(Encyclopedia)Brooklyn bro͝okˈlĭn [key], borough of New York City (2020 pop. 2,736,074), 71 sq mi (184 sq ...

Amsterdam, city, Netherlands

(Encyclopedia)Amsterdam ămˈstərdămˌ, Dutch ämstərdämˈ [key], city (2021 pop. 1,157,519), constitutional capital and largest city of the Kingdom of the Netherlands, Nort...