The Collaborative International Dictionary of English v.0.48:
Pitter \Pit"ter\, n. A contrivance for removing the pits from peaches, plums, and other stone fruit. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Pitter \Pit"ter\, v. i. To make a pattering sound; to murmur; as, pittering streams. [Obs.] --R. Greene. [1913 Webster]