In ancient geography, people inhabiting regions on opposite sides of the equator at the same longitude, experiencing the same seasons.
From Greek 'antoikoi' meaning inhabitants of opposite lands, from anti- (opposite) + oikoi (inhabitants). This term was used in classical geography to describe theoretical populations.
Ancient geographers imagined antoeci—people living in the exact opposite hemisphere, experiencing summer when you experience winter—and they were almost right, except most opposite points on Earth are just empty ocean.
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