coronal hole
noun Astronomy.
a part of the solar corona that appears dark on optical and x-ray images and is characterized by low temperature and low density.
Origin of coronal hole
First recorded in 1970–75
Words nearby coronal hole
coronach,
coronado,
coronado, francisco,
coronagraph,
coronal,
coronal hole,
coronal mass ejection,
coronal plane,
coronal suture,
coronarism,
coronaritis