a half of a sphere
半球,半球体。
a half of the earth, usually as divided into northern and southern halves by the equator, or into western and eastern halves by an imaginary line passing through the poles
(地球的)半球。
a half of the celestial sphere
(天球的)半球。
(亦作
(脊椎动物的)大脑半球。
"late Middle English (in the sense ‘half the celestial sphere, the sky’): from Old French