rheiddiadur

== Welsh == === Etymology === From rheiddio (“to beam, to radiate”) +‎ -adur (“-ator”). === Pronunciation === (North Wales) IPA(key): /r̥ei̯ðˈjadɨ̞r/ (South Wales) IPA(key): /r̥ei̯ðˈjaːdɪr/, /r̥ei̯ðˈjadɪr/ === Noun === rheiddiadur m (plural rheiddiaduron) radiator ==== Related terms ==== rheiddiadu === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “rheiddiadur”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies