hemisphere

Definition

Half of the celestial sphere, as divided by either the ecliptic or the celestial equator .

Etymology

From Latin hemisphaerium, from Ancient Greek ἡμισφαίριον (hēmisphaírion), from ἡμι- (hēmi-, “half”) + σφαῖρα (sphaîra, “sphere”). Equivalent to hemi- + sphere. Displaced native Old English healftrendel (literally “half-sphere”).

Example Sentences

• "Love is the Columbus of our moral world, and opens, at some period or other, a new hemisphere to our view."

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