Magdeburg hemisphere

Magdeburg hemisphere
one of a pair of hemispherical cups from which air can be evacuated when they are placed together: used to demonstrate the force of air pressure.
[after MAGDEBURG, where German statesman and physicist Otto von Guericke (1602-86) constructed a pair of such hemispheres]

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Universalium. 2010.

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  • magdeburg hemisphere — noun Usage: usually capitalized M : either of a pair of hemispherical cups forming when placed together a cavity from which the air can be withdrawn by an air pump and used to illustrate the pressure of air * * * Physics. one of a pair of… …   Useful english dictionary

  • hémisphère — [ emisfɛr ] n. m. • 1611; hemispere 1544; lat. hemispherium, mot gr.→ sphère 1 ♦ Chacune des deux moitiés d une sphère limitée par un des plans passant par le centre. ⇒ calotte (sphérique). Voûte en hémisphère. ⇒ coupole. 2 ♦ Géogr. Moitié du… …   Encyclopédie Universelle

  • Magdeburg hemispheres — Hemisphere Hem i*sphere, n. [L. hemisphaerium, Gr. ?; ? half = ? sphere: cf. F. h[ e]misph[ e]re. See {Hemi }, and {Sphere}.] 1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Hemisphere — Hem i*sphere, n. [L. hemisphaerium, Gr. ?; ? half = ? sphere: cf. F. h[ e]misph[ e]re. See {Hemi }, and {Sphere}.] 1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. [1913 Webster] 2. Half of the… …   The Collaborative International Dictionary of English

  • Magdeburg — Mag de*burg, n. A city of Saxony. [1913 Webster] {Magdeburg centuries}, {Magdeburg hemispheres}. See under {Century}, and {Hemisphere}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Magdeburg centuries — Magdeburg Mag de*burg, n. A city of Saxony. [1913 Webster] {Magdeburg centuries}, {Magdeburg hemispheres}. See under {Century}, and {Hemisphere}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Magdeburg hemispheres — Magdeburg Mag de*burg, n. A city of Saxony. [1913 Webster] {Magdeburg centuries}, {Magdeburg hemispheres}. See under {Century}, and {Hemisphere}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Magdeburg centuries — Magdeburg centuries, hemispheres see century 8, hemisphere 1 b …   Useful english dictionary

  • Magdeburg hemispheres — Gaspar Schott s sketch of Otto von Guericke s Magdeburg hemispheres experiment. The Magdeburg hemispheres are a pair of large copper hemispheres with mating rims. When the rims were sealed with grease and the air was pumped out, the sphere… …   Wikipedia

  • Otto von Guericke — Otto von Guericke, engraving by Anselmus von Hulle, (1601 1674) Born …   Wikipedia

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