rhithiol

== Welsh == === Etymology === From rhith (“illusion; guise”) +‎ -iol. === Adjective === rhithiol (feminine singular rhithiol, plural rhithiol, equative mor rithiol, comparative mwy rhithiol, superlative mwyaf rhithiol) illusory virtual ==== Derived terms ==== anewra rhithiol (“ghostwort”) chwimwyfyn rhithiol (“ghost moth”) y galdrist rithiol (“ghost orchid”) === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “rhithiol”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies