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kaleidoscope

(Encyclopedia)kaleidoscope kəlīˈdəskōp [key], optical instrument that uses mirrors to produce changing symmetrical patterns. Invented by the Scottish physicist Sir David Brewster in 1816, the device is usually...

stroboscope

(Encyclopedia)stroboscope strŏbˈəskōp [key], optical instrument for making a moving object appear to be slowed down or stationary. This effect is created by interrupting the observer's view so that the object i...

Socinianism

(Encyclopedia)Socinianism sōsĭˈnēənĭzəm [key], anti-Trinitarian religious movement organized in Poland in the 16th cent. by Faustus Socinus. Antecedents of the movement were such Italian humanist reformers a...

Japanese music

(Encyclopedia)Japanese music, the highly eclectic musical culture of the Japanese islands. Over the years, Japan has borrowed musical instruments, scales, and styles from many neighboring areas. The indigenous musi...

surveying

(Encyclopedia)surveying, method of determining accurately points and lines of direction (bearings) on the earth's surface and preparing from them maps or plans. Boundaries, areas, elevations, construction lines, an...

voice, sound produced by living beings

(Encyclopedia)voice, sound produced by living beings. The source of the sound in human speaking and singing is the vibration of the vocal cords, which are inside the larynx, and the production of the sounds is call...

air navigation

(Encyclopedia)air navigation, science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course (see navigation). Basic to air ...

Martin, Steve

(Encyclopedia)Martin, Steve, 1945–, American comedian, actor, and writer, b. Waco, Tex. An Emmy-winning television comedy writer in the late 1960s for the Smothers ...

ruthenium

(Encyclopedia)ruthenium ro͞othēˈnēəm [key], metallic chemical element; symbol Ru; at. no. 44; at. wt. 101.07; m.p. about 2,310℃; b.p. about 3,900℃; sp. gr. 12.41 at 20℃; valence commonly +2, +3, +4, +6, ...

ophthalmology

(Encyclopedia)ophthalmology ŏfˌthălmŏlˈəjē [key], branch of medicine specializing in the anatomy, function and diseases of the eye. Ophthalmologists specialize in the medical and surgical treatment of eye di...