| n. | 1. | (Meteorol.) 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. |
| 2. | A fragmentary rainbow; a small rainbow near the horizon; - called also |
| 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" |