资料来源 : pyDict

幻日

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Sundog \Sun"dog`\, n. (Meteor.)
   A fragmentary rainbow; a small rainbow near the horizon; --
   called also {dog} and {weathergaw}.

Sundog \Sun"dog`\, n. (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.

资料来源 : WordNet®

sundog
     n : 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}]