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Yn ol OED 'fine chemicals n. chemicals produced in a relatively pure state; (in later use) esp. chemicals produced to a very high degree of purity for use in research and industry.' Fyddai 'cemegion pur' yn gwneud y tro? Neu oes yna derm arall? Diolch Sylvia. -- Dr Sylvia Prys Jones 01248 382036 <[log in to unmask]> Pennaeth yr Uned Gyfieithu/Head of Translation Unit Canolfan Bedwyr Prifysgol Bangor/Bangor University