单词	hemisphere
释义	hemispherehemisphere /ˈhɛməˌsfɪr/ ●○○ noun [countable] Etymology ETYMOLOGYhemisphere Origin: 1500-1600 Latin hemisphaerium, from Greek, from hemi- half + sphairion small sphere 1 earth science, geography one of the halves of the Earth, especially the northern or southern parts above and below the equator:  the Northern hemisphere → see also Western Hemisphere2science, biology one of the two halves of your brain3math, geometry half of a sphere (=an object which is round like a ball) that is made by a plane going through the center of the sphere
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