a bright spot on the parhelic circle; caused by diffraction by ice crystals;
"two or more parhelia are usually seen at once"
例句
Analogous to a sundog or parhelion, the paraselene is produced by moonlight shining through thin, hexagonal-shaped ice crystals in high cirrus clouds. 类似环日的形成一样，在高空卷云中，月光通过稀薄、具有六边形状的冰晶时产生了幻月。
