callestrai

From callestr (“flint”) +‎ -ai, a calque of English silicon or New Latin silicium, from Latin silex (“flint, silica”).

• (cy) IPA^(key): /kaˈɬɛsdrai̯/

callestrai m (uncountable)

1. (obsolete) silicon

   Synonym: silicon

• blorai (“nitrogen”)
• ufelai (“oxygen”)
• ulai (“hydrogen”)

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “callestrai”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies