Source : Webster's Revised Unabridged Dictionary (1913)

Sunbird \Sun"bird`\, n. (Zo["o]l.)
   (a) Any one of numerous species of small brilliantly colored
       birds of the family {Nectariniid[ae]}, native of Africa,
       Southern Asia, the East Indies, and Australia. In
       external appearance and habits they somewhat resemble
       humming birds, but they are true singing birds (Oscines).
   (b) The sun bittern.