hemisphere
Pronunciation:
/ˈhɛmɪsfɪə//ˈhɛmɪsfɪəɹ/noun
Definitions
Half of the celestial sphere, as divided by either the ecliptic or the celestial equator .
A realm or domain of activity .
Half of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc. .
Any half-sphere, formed by a plane intersecting the center of a sphere. .