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Service, Robert William

(Encyclopedia)Service, Robert William, 1874–1958, Canadian poet and novelist, b. England, educated at the Univ. of Glasgow. He went to Canada in 1897 and held odd jobs in British Columbia and at Whitehorse in the...

prism

(Encyclopedia)prism, in optics, a piece of translucent glass or crystal used to form a spectrum of light separated according to colors. Its cross section is usually triangular. The light becomes separated because d...

Saint David's

(Encyclopedia)Saint David's, Welsh Tyddewi, small town, Pembrokeshire, SW Wales. The renowned town cathedral is mainly Transitional Norman in style, built of red-violet stone. Among its features is the late 13th-ce...

airglow

(Encyclopedia)airglow, faint diffuse illumination of the sky originating in the upper atmosphere. Although it occurs at all times of day throughout the upper atmosphere, it is most typically visible to an observer ...

Osler, Sir William

(Encyclopedia)Osler, Sir William ōˈslər [key], 1849–1919, Canadian physician, M.D. McGill Univ., 1872. Renowned as a physician and as a medical historian, he was also the most brilliant and influential teacher...

Petlyura, Simon

(Encyclopedia)Petlyura, Simon sĭmyōnˈ pyətlyo͞oˈrə [key], 1879–1926, Ukrainian nationalist politician. In Jan., 1919, he became leader of the independent Ukrainian republic that emerged after the collapse ...

rainbow

(Encyclopedia)rainbow, arc showing the colors of the spectrum, violet inside and red outside, which appears when the sun shines through water droplets. It often appears while the sun is shining after a brief thunde...

vision

(Encyclopedia)CE5 Optic nerve vision, physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Defects of vision include astigmatism, color blindness, far...

North Dakota

(Encyclopedia)CE5 North Dakota, state in the N central United States. It is bordered by Minnesota, across the Red River of the North (E), South Dakota (S), Montana (W), and the Canadian provinces of Saskatchewan...

Elat

(Encyclopedia)Elat or Eilat both: āˈlät [key] [Heb.,=trees], city, S Israel, a port on the Gulf of Aqaba, ...