# hemisphere

> English word · Noun · IPA /ˈhɛmɪsfɪə/ · frequency rank #11,392

## Definitions
1. Half of the celestial sphere, as divided by either the ecliptic or the celestial equator .
2. A realm or domain of activity .
3. Half of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc. .
4. Any half-sphere, formed by a plane intersecting the center of a sphere. .
5. A map or projection of a celestial or terrestrial hemisphere .
6. Either of the two halves of the cerebrum. .

## Etymology
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”).

## Common misspellings (15)
`ehmisphere`, `heimsphere`, `hemipshere`, `hemishpere`, `hemispehre`, `hemispheer`, `hemispherre`, `hemisphhere`, `hemisphree`, `hemispphere`, `hemissphere`, `hemmisphere`, `hemsiphere`, `hhemisphere`, `hmeisphere`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/hemisphere