Columbia Encyclopedia

(Encyclopedia) emerald, the green variety of beryl, of which aquamarine is the blue variety. Chemically, it is a beryllium-aluminum silicate whose color is due to small quantities of chromium compounds. The emerald ...

(Encyclopedia) English setter, breed of large sporting dog developed over hundreds of years in England. It stands about 25 in. (63.5 cm) high at the shoulder and weighs about 60 lb (27.2 kg). Its flat or slightly wa...

(Encyclopedia) Gezira, Al äl jäzēˈrä [key], region, SE Sudan, occupying the tract between the White and Blue Niles south of their convergence at Khartoum. The Arabic word Gezira means “island” or “peninsu...

(Encyclopedia) greyhound, breed of tall, swift, sight hound developed nearly 5,000 years ago in Egypt. It stands about 26 in. (66 cm) high at the shoulder and weighs about 65 lb (29.5 kg). Its short, smooth coat may...

(Encyclopedia) pompano pŏmˈpənō [key], common name for fishes of the genus Trachinotus, members of a large and important family (Carangidae) of mackerellike fishes, abundant in warm seas around the world. They h...

(Encyclopedia) Webster, Noah, 1758–1843, American lexicographer and philologist, b. West Hartford, Conn., grad. Yale, 1778. After serving in the American Revolution, Webster practiced law in Hartford. His Grammati...

(Encyclopedia) Pacific Remote Islands Marine National Monument, c.490,000 sq mi (1,260,000 sq km), central Pacific Ocean; est. 2009. The monument comprises the waters and reefs surrounding seven islands and atolls, ...

(Encyclopedia) Chattanooga chătˌəno͞oˈgə [key], city (2020 pop. 181,099), seat of Hamilton co., E Tenn., on both ...

(Encyclopedia) Roche, Kevin, 1922–2019, Irish-American architect, b. Dublin, grad. National Univ. of Ireland, Dublin (1943) and, after immigrating (1948) to the United States, studied Illinois Institute of Technol...

(Encyclopedia) tennessine tĕnˈəsēn [key], artificially produced radioactive chemical element; symbol Ts; at. no. 117; mass number of most stable isotope 294; m.p., b.p., sp. gr., and valence unknown. Tennessine ...