gwladwriaeth dysgeidiaeth

== Welsh == === Noun === gwladwriaeth dysgeidiaeth f (plural gwladwriaethau dysgeidiaeth) (historical) the commonwealth of learning, the republic of letters === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwladwriaeth dysgeidiaeth”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies