'Sundog' definitions:

Definition of 'sundog'

From: WordNet
noun
A bright spot on the parhelic circle; caused by diffraction by ice crystals; "two or more parhelia are usually seen at once" [syn: parhelion, mock sun, sundog]

Definition of 'Sundog'

From: GCIDE
  • Sundog \Sun"dog`\, n. (Meteorol.)
  • 1. A luminous spot occasionally seen a few degrees from the sun, supposed to be formed by the intersection of two or more halos, or in a manner similar to that of halos. [1913 Webster]
  • 2. A fragmentary rainbow; a small rainbow near the horizon; -- called also dog and weathergaw. [Webster 1913 Suppl.]