rheoliad

== Welsh == === Etymology === From rheoli (“to rule, to govern, to regulate”) +‎ -iad. === Pronunciation === IPA(key): /r̥ɛˈɔljad/ === Noun === rheoliad m (plural rheoliadau) regulation, control rule, regulation === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “rheoliad”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies