writ of right, of reasonable part A writ which lay between privies in blood, as between brothers in gavelkind, or between sisters or other coparceners for lands in fee-simple, where one was deprived of his or her share by another. Reg. orig. 3b; Fitzh. Nat Brev. 9, B. Abolished by St 3 & 4 wm. IV. C. 27