Aberystwyth (ăbˌərĭstˈwĭth) [key], town (1991 pop. 10,250), Ceredigion, W Wales, on Cardigan Bay. It is a summer resort and cultural center. Before the construction of railroads, Aberystwyth was a coastal trading center. The town is the seat of Aberystwyth Univ. and of the National Library of Wales, which has an outstanding collection of Welsh manuscripts.
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