hafaliad

== Welsh == === Etymology === From hafal (“equal”) +‎ -iad. === Noun === hafaliad m (plural hafaliadau, not mutable) (mathematics) equation ==== Derived terms ==== hafaliad cwadratig (“quadratic equation”) hafaliad cydamserol (“simultaneous equation”) hafaliad llinol (“linear equation”) === Further reading === 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 D. G. Lewis, N. Lewis, editors (2005–present), “hafaliad”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “hafaliad”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies