coronal hole
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/09/Coronal_Hole_Magnetic_Field_Lines.svg/130px-Coronal_Hole_Magnetic_Field_Lines.svg.png)
Noun
[edit]coronal hole (plural coronal holes)
- (astrophysics) A region in the corona of a star where magnetic field lines extend out into space, allowing solar wind to escape.
See also
[edit]Further reading
[edit]coronal hole on Wikipedia.Wikipedia