'Rewel bone' definitions:

Definition of 'Rewel bone'

From: GCIDE

Rewel bone \Rew"el bone`\ [Perh. from F. rouelle, dim. of roue a wheel, L. rota.] An obsolete phrase of disputed meaning, -- perhaps, smooth or polished bone. [1913 Webster]
His saddle was of rewel boon. --Chaucer. [1913 Webster]