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Pan-Germanism

(Encyclopedia)Pan-Germanism, German nationalist doctrine aiming at the union of all German-speaking peoples under German rule. Pan-Germanists considered that not only the German groups in neighboring countries, suc...

Rohrer, Heinrich

(Encyclopedia)Rohrer, Heinrich, 1933–2013, Swiss physicist, Ph.D. Swiss Federal Institute of Technology, 1960. He joined IBM in 1963 and spent almost his entire career with the company, retiring in 1997. At the I...

turn and bank indicator

(Encyclopedia)turn and bank indicator, aircraft instrument containing one indicator to show turning, or rotation about the vertical axis, and another to show banking, or rotation about the longitudinal axis. The tw...

tachometer

(Encyclopedia)tachometer tăkŏmˈətər [key], instrument that indicates the speed, usually in revolutions per minute, at which an engine shaft is rotating. Some tachometers, especially those used in automobiles, ...

theodolite

(Encyclopedia)theodolite thēŏdˈəlītˌ [key], calibrated optical instrument used to determine relative position in surveying, navigation, and meteorology. It is similar in construction to a surveyor's transit, ...

sitar

(Encyclopedia)CE5 Sitar sitar sĭtärˈ [key], fretted string instrument with a gourdlike body and a long neck, similar to the lute. It has from 3 to 7 gut strings, tuned in fourths or fifths (or both), and a l...

spectroheliograph

(Encyclopedia)spectroheliograph, device for photographing the surface of the sun in a single wavelength of light, usually one corresponding to a chief element contained in the sun, e.g., hydrogen or calcium; the re...

Siding Spring Observatory

(Encyclopedia)Siding Spring Observatory, astronomical observatory located on Siding Spring Mountain, near Coonabarabran, at an altitude of nearly 4,000 ft (1,220 m) in the Warrumbungle Mts. of New South Wales, Aust...

meiosis

(Encyclopedia)CE5 Formation of sperm cells through meiosis meiosis mīŏˈsĭs [key], process of nuclear division in a living cell by which the number of chromosomes is reduced to half the original number. Meio...

Shankar, Ravi

(Encyclopedia)Shankar, Ravi (Robindra Shankar Chowdhury), 1920–2012, Indian sitarist and composer, b. Varanasi. He was the first Indian instrumentalist to attain an international reputation and is credited with i...