The Collaborative International Dictionary of English v.0.48:

Alcedo \Al*ce"do\, n. [L., equiv. to Gr. ?. See Halcyon.]
   (Zool.)
   A genus of perching birds, including the European kingfisher
   (Alcedo ispida). See Halcyon.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Alcedo
    n 1: type genus of the Alcedinidae [syn: Alcedo, genus
         Alcedo]