Inherited from Middle Welsh halaen, cf. maharen (“ram”) from maharaen. Doublet of halen (“table salt”).
halwyn m (plural halwynau, not mutable)
- (chemistry) salt
- Synonym: hâl
- 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