adweithydd

== Welsh == === Etymology === From adweithio (“to react”) +‎ -ydd. === Pronunciation === (North Wales) IPA(key): /adˈwei̯θɨ̞ð/ (South Wales) IPA(key): /adˈwei̯θɪð/ === Noun === adweithydd m (plural adweithyddion) reactor ==== Derived terms ==== adweithydd niwclear (“nuclear reactor”) === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “adweithydd”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies Delyth Prys; J.P.M. Jones; Owain Davies; Gruffudd Prys (2006), Y Termiadur: termau wedi'u safoni; standardised terminology‎[1] (in Welsh), Cardiff: Awdurdod cymwysterau, cwricwlwm ac asesu Cymru (Qualifications curriculum & assessment authority for Wales), →ISBN