gwythïen

== Welsh == === Alternative forms === gwythen === Etymology === Singulative of gwythi (“veins”, archaic), plural of gŵyth (“vein”, archaic). === Noun === gwythïen m or f (plural gwythiennau or gwythienni) (anatomy) vein ==== Derived terms ==== gwythiennol (“venous”) ==== Related terms ==== rhedweli (“artery”) === Mutation === === References ===