Source : Webster's Revised Unabridged Dictionary (1913)

Chickadee \Chick"a*dee`\, n. (Zo["o]l.)
   A small bird, the blackcap titmouse ({Parus atricapillus}),
   of North America; -- named from its note.

Source : WordNet®

chickadee
     n : any of various small gray-and-black songbirds of North
         America