Oesoedd Canol

== Welsh == === Alternative forms === yr Oesau Canol === Noun === yr Oesoedd Canol (history) the Middle Ages === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “Oesoedd Canol”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies