llysiau cwsg

== Welsh == === Alternative forms === llysiau'r cwsg === Etymology === Literally "the sleep's herbs". === Noun === llysiau cwsg (plural, singular llysieuyn cwsg m) opium poppy (Papaver somniferum) ==== Synonyms ==== === References === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “llysiau”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies