RHIDERIN, or RHYTCRIW (RHID-YRHIN), a hamlet, in the parish of LLANEGRIN, hundred of TALY-BONT, county of MERIONETH, NORTH WALES, 4 miles (N.) from Towyn; containing 501 inhabitants. The name is derived from a dangerous ford by which the Dysyni was crossed at this place. The hamlet comprises the western portion of the parish, having the parish of Llangelynin on the west, and the river Dysyni on the east and south. It contains the church, which is seated on the declivity of a lofty mountain near the Dysyni; and several respectable residences, some of which command extensive views of the ocean, are scattered over it.