Source : Webster's Revised Unabridged Dictionary (1913)

Polliwig \Pol"li*wig\, Polliwog \Pol"li*wog\, n. [OE. polwigle.
   Cf. {Poll} head, and {Wiggle}.] (Zo["o]l.)
   A tadpole; -- called also {purwiggy} and {porwigle}.