The Collaborative International Dictionary of English v.0.48:

Royne \Royne\ (roin), v. t. [F. rogner, OF. rooignier, to clip,
   pare, scare, fr. L. rotundus round See Rotund.]
   To bite; to gnaw. [Written also roin.] [Obs.] --Spenser.
   [1913 Webster]