hemisphere
n. countablen. one half of a round object, like the Earth or your brain.
n. half of a sphere or globe; specifically, one of the two halves of the Earth or the brain.
Australia is located in the Southern Hemisphere.
The left hemisphere of the brain is typically associated with language and logical processing.
Migratory patterns often involve birds traveling between the Northern and Southern hemispheres to take advantage of seasonal food abundance and favorable breeding conditions.
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”).
Often capitalized when referring to specific halves of the Earth (e.g., the Northern Hemisphere).