| Term: | CoronalHole |
| Definition: |
An extended region of the corona,exceptionally low in density and associated with unipolar photosphericregions. A coronal hole can be an "open" magnetic field in the corona and(perhaps) inner heliosphere which has a faster than average outflow (wind);A region of lower than "quiet" ion and electron density in the corona; or aregion of lower peak electron temperature in the corona than in the "quiet"corona. |