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Diferion gwydr.
Diferion gwydr
Swigod o wydr yw diferion gwydr[1] neu ddiferion y Tywysog Rupert a wneir trwy ddiferu gwydr tawdd i mewn i ddŵr. Maent yn edrych yn debyg i benbyliaid.
Mae ganddynt ddiriant gweddillol uchel iawn. O ganlyniad, os caiff y cynffon ei dorri o gwbl, mae'r holl ddiferyn yn ffrwydro'n fanion. Y Tywysog Rupert a ddaeth â diferion gwydr i Loegr yn gyntaf.[2]
↑Griffiths, Bruce a Jones, Dafydd Glyn. Geiriadur yr Academi (Caerdydd, Gwasg Prifysgol Cymru, 1995 [argraffiad 2006]), t. 1077 [Prince Rupert's drops].
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