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Piqua

(Encyclopedia)Piqua pĭkˈwā [key], city (1990 pop. 20,612), Miami co., W Ohio, on the Miami River; settled 1797, chartered 1929. It is an industrial city with diverse manufactures, including airplane and automobi...

Pomona, city, United States

(Encyclopedia)Pomona pəmōˈnə [key], city (1990 pop. 131,723), Los Angeles co., S Calif. at the foot of the San Gabriel Mts.; inc. 1888. It is a residential, industrial, and commercial suburb of Los Angeles wher...

alumina

(Encyclopedia)alumina əlo͞oˈmĭnə [key] or aluminum oxide, Al2O3, chemical compound with m.p. about 2,000℃ and sp. gr. about 4.0. It is insoluble in water and organic liquids and very slightly soluble in stro...

Douglas, cities, United States

(Encyclopedia)Douglas. 1 City (2020 pop. 16,534), Cochise co., SE Ariz., at the Mexican border; inc. 1905. The mining and smelting of copper have been ...

lapis lazuli

(Encyclopedia)lapis lazuli lăpˈĭs lăzˈo͝olē [key], gem, deep blue, violet, or greenish blue in color and usually flecked with yellow iron pyrites. It is composed of lazurite, a complex sodium aluminum silica...

Penetanguishene

(Encyclopedia)Penetanguishene pĕnˌətăngˌgəshēnˈ, –gwəshēnˈ [key], town (1991 pop. 6,643), S Ont., Canada, on Penetanguishene Bay, an inlet of Georgian Bay. The name is a Native American word for “whi...

Tamworth

(Encyclopedia)Tamworth, city (1991 pop. 63,260) and district, Staffordshire, W central England. Its products include clothing, textiles, and aluminum ware. An amusement park and zoo are nearby. Tamworth was burned ...

tanzanite

(Encyclopedia)tanzanite tănzănˈīt [key], beautiful gemstone discovered in 1967 in the Umba Valley near the Usambara Mts. in Tanzania, a precious variety of the mineral zoisite, a calcium aluminum silicate. Zois...

platform tennis

(Encyclopedia)platform tennis, version of lawn tennis played on an elevated wooden or aluminum court that is one fourth the size of a standard court, usually by doubles teams. Unlike lawn tennis, platform tennis al...

Podgorica

(Encyclopedia)Podgorica pōdˈgōrētsä [key], city (2011 pop. 185,937), capital and largest city of Montenegro, SE Montenegro, at the confluence of the Ribnica and Morača rivers. A commercial center, it has indu...