sundog
/ˈsʌnˌdɔɡ/
noun
- A bright spot or patch of light that appears on one or both sides of the sun, caused by ice crystals in the atmosphere; also called a parhelion.
- Pilots sometimes use sundogs as a weather sign, since they often mean cold air and ice crystals are present.
- The sundog appeared to the left of the sun, a rainbow-colored arc of light.
- We saw a beautiful sundog in the sky this morning, glowing like a second sun.
Synonyms