bara a chaws y gwcw

== Welsh == === Alternative forms === bara caws y gwcw === Etymology === Literally, “bread and cheese of the cuckoo”. === Noun === bara a chaws y gwcw m wood sorrel (Oxalis acetosella) Synonyms: suran y coed, bara a chaws y gog common sorrel (Rumex acetosa) Synonym: suran y cŵn === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “bara a chaws y gwcw”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies