Dyfed (dŭvˈĕd) [key], former county, W Wales. It was created in the 1974 administrative reorganization of Wales from the counties of Cardiganshire, Carmarthenshire, and Pembrokeshire, but in 1996 the county was dissolved and the unitary authorities of Ceredigion, Carmarthenshire, and Pembrokeshire (corresponding respectively to the old counties) were established.
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