noun

hemisphere

hemisphere

Australia is in the Southern Hemisphere.

Australia is in the Southern Hemisphere.

The left hemisphere of the brain controls the right side.

The left hemisphere of the brain controls the right side.

((the ... hemisphere)) referring to a part of the Earth Japan is in the Northern Hemisphere.

Synonyms: half, side, section

From Greek 'hemi-' (half) + 'sphaira' (sphere).

'Hemi-' means half, just like in 'semicircle'. So, a hemisphere is half a sphere, like half of the Earth.

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