hemisphere

n. அரையுருண்டை வடிவம், நிலவுலக அரைக்கோளம், நிலவுலக அரைக்கோள மனைப்படம், வான்கோள கையின் பாதி, மூளையின் இருபாதிகளில் ஒன்று.

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Hem"i*sphere, n. Etym: [L. hemisphaerium, Gr. hémisphère. See Hemi-, and Sphere.] 1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. 2. Half of the terrestrial globe, or a projection of the same in a map or picture. 3. The people who inhabit a hemisphere. He died . . . mourned by a hemisphere. J. P. Peters. ten Cerebral hemispheres. (Anat.) See Brain. -- Magdeburg hemispheres (Physics), two hemispherical cups forming, when placed together, a cavity from which the air can be withdrawn by an air pump; -- used to illustrate the pressure of the air. So called because invented by Otto von Guericke at Magdeburg.

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