n.a luminous halo parallel to the horizon at the altitude of the sun; caused by ice crystals in the atmosphere
同义词：solar haloparhelic ring
英汉双解大词典
parhelic circle
1.
N（名词）
a luminous band at the same altitude as the sun, parallel to the horizon, caused by reflection of the sun's rays by ice crystals in the atmosphere 幻日环 [meteorol]