sundog

[suhn-dawg, -dog] /ˈsʌnˌdɔg, -ˌdɒg/
noun
1.
2.
a small or incomplete rainbow.
Origin
1625-35; origin uncertain
Examples from the web for sundog
  • The moist, coastal air has moved in and the sun is constantly ringed with a sundog.
British Dictionary definitions for sundog

sundog

/ˈsʌnˌdɒɡ/
noun
1.
another word for parhelion
2.
a small rainbow or halo near the horizon
Word Origin and History for sundog
n.

"mock sun, parhelion," 1650s, of obscure origin.