trydydd isradd

== Welsh == === Etymology === Literally “third root”. === Noun === trydydd isradd f (plural trydydd israddau) (mathematics) cube root Synonyms: gwreiddyn ciwb, gwreiddyn trysawdd ==== Coordinate terms ==== ail isradd (“square root”) === Mutation === === References === 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 R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “trydydd isradd”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies