Source : Webster's Revised Unabridged Dictionary (1913)

Caddow \Cad"dow\, n. [OE. cadawe, prob. fr. ca chough + daw
   jackdaw; cf. Gael. cadhag, cathag. Cf. {Chough}, {Daw}, n.]
   (Zo["o]l.)
   A jackdaw. [Prov. Eng.]