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spectral class

(Encyclopedia)CE5 spectral class, in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically....

wapiti

(Encyclopedia)wapiti wŏpˈĭtē [key], large North American deer, Cervus canadensis, closely related to the Old World red deer. It is commonly called elk in America although the name elk is used in Europe to refer...

blood bank

(Encyclopedia)blood bank, site or mobile unit for collecting, processing, typing, and storing whole blood, blood plasma and other blood constituents. Most hospitals maintain their own blood reserves, and the Americ...

Delhi

(Encyclopedia)Delhi dĕlˈē [key], union territory and city, N central India. The union territory, officia...

streptococcus

(Encyclopedia)streptococcus strĕpˌtəkŏkˈəs [key], any of a group of gram-positive bacteria, genus Streptococcus, some of which cause disease. Streptococci are spherical and divide by fission, but they remain ...

O'Connor, Basil

(Encyclopedia)O'Connor, Basil (Daniel Basil O'Connor), 1892–1972, American lawyer and philanthropic official, b. Taunton, Mass., grad. Harvard Law School, 1915. He practiced law in New York and Boston, entering i...

litmus

(Encyclopedia)litmus, organic dye usually used in the laboratory as an indicator of acidity or alkalinity (see acids and bases). Naturally pink in color, it turns blue in alkali solutions and red in acids. Commonly...

logwood

(Encyclopedia)logwood, small, thorny tree (Haematoxylon campechianum) of the family Leguminosae (pulse family) native to tropical America and introduced into other tropical regions. The brown-red heartwood is the s...

Moro, Aldo

(Encyclopedia)Moro, Aldo älˈdō môˈrō [key], 1916–78, Italian political leader. A lawyer, he entered national politics in 1946, when he was elected to the constituent assembly as a member of the Christian De...

Natchitoches

(Encyclopedia)Natchitoches nakˈətäsh [key], city (1990 pop. 16,609), seat of Natchitoches parish, NW La.; inc. 1819. Its industry is centered on the production, processing, and shipping of lumber and farm produc...