hemispheric

"Hemispheric" describes anything relating to a hemisphere, which is one half of a sphere. In real use, it most often appears when people talk about the Earth or the brain. For the Earth, it can refer to the Northern and Southern Hemispheres, divided by the equator, or the Eastern and Western Hemispheres, divided in a more general way by lines of longitude. Because of that, the word often appears in geography, climate, and international politics. For example, people may talk about hemispheric weather patterns, hemispheric air circulation, or hemispheric relations among countries in the Americas.

The word is also common in discussions of the brain. The brain has left and right hemispheres, so researchers may write about hemispheric differences, hemispheric damage, or hemispheric specialization. In this context, the word simply means "connected with one side of the brain" or "connected with the division between the brain's two halves."

Less commonly, it can be used for any system understood in two large halves, but the idea stays the same: something linked to one hemisphere or to the division into hemispheres. So whether the subject is the planet, climate, world affairs, or the brain, "hemispheric" points back to the idea of a rounded whole divided into two halves.