catalydd

Adapted borrowing of English catalyst + -ydd.

• (North Wales) IPA^(key): /kaˈtalɨ̞ð/
• (South Wales) IPA^(key): /kaˈta(ː)lɪð/

catalydd m (plural catalyddion)

1. (chemistry) catalyst

   Synonym: cyflymydd

• catalysis
• catalytig (“catalytic”)

• D. G. Lewis, N. Lewis, editors (2005–present), “catalydd”, in Gweiadur: the Welsh–English Dictionary, Gwerin
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “catalydd”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies