The Collaborative International Dictionary of English v.0.48:

Seraph \Ser"aph\, n.; pl. E. Seraphs, Heb. Seraphim. [Heb.
   ser[=a]phim, pl.]
   One of an order of celestial beings, each having three pairs
   of wings. In ecclesiastical art and in poetry, a seraph is
   represented as one of a class of angels. --Isa. vi. 2.
   [1913 Webster]

         As full, as perfect, in vile man that mourns,
         As the rapt seraph that adores and burns. --Pope.
   [1913 Webster]

   Seraph moth (Zool.), any one of numerous species of
      geometrid moths of the genus Lobophora, having the hind
      wings deeply bilobed, so that they seem to have six wings.
      [1913 Webster] Seraphic

WordNet (r) 3.0 (2006):

seraph
    n 1: an angel of the first order; usually portrayed as the
         winged head of a child