Puaa, n. Pig. (obsolete.) Cook relates that the Maoris in conversation mentioned the pig not by description but by name; that they called it booak, which he says was the same as the name he had heard in the South Sea Islands (Voyages, ed. 1793, vol. ii, p. 372). The word has been entirely displaced by the imported poaka = porker, which has been erroneously supposed to be connected with the above.
Williams Dictionary