Definition of York, Custom of
A custom of the province of York in England, by which the effects of an intestate, after payment of his debts, were in general divided according to the ancient universal doctrine of the pars rationabilis; that is, one-third each to the widow, children, and administrator. 2 Bl.Comm. 518.
That's the definition of York, Custom of in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.