gwyfyn sidan

== Welsh == === Noun === gwyfyn sidan m (plural gwyfynod sidan) silkmoth ==== Related terms ==== pryf sidan (“silkworm”) === Mutation === === Further reading === Griffiths, Bruce; Glyn Jones, Dafydd (1995), “silk”, in Geiriadur yr Academi: The Welsh Academy English–Welsh Dictionary‎[1], Cardiff: University of Wales Press, →ISBN