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1. See parhelion.
2. A small halo, sometimes resembling part of a rainbow, near the horizon just off the parhelic circle.
1. (Physical Geography) another word for parhelion
2. (Physical Geography) a small rainbow or halo near the horizon
2. a small or incomplete rainbow.
[1625–35; orig. uncertain]
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|Noun||1.||sundog - a bright spot on the parhelic circle; caused by diffraction by ice crystals; "two or more parhelia are usually seen at once"|