gwylaeth y fagwyr

== Welsh == === Etymology === gwylaeth (“lettuce”) + magwyr (“wall”) === Noun === gwylaeth y fagwyr m or f (plural gwylaethau y fagwyr) wall lettuce (plant) (Lactuca muralis, syn. Mycelis muralis) === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “fagwyr”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies