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Dyfed (dŭvˈĕd), 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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a former county in SW Wales: created in 1974 from Cardiganshire, Pembrokeshire, and Carmarthenshire; in 1996 it was replaced by Pembrokeshire, Carmarthenshire, and Ceredigion
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005