English: bacterial strain
Welsh: straen bacterol
Subject: Amaeth
Welsh context: Mae enw’r straen bacterol wedi ei newid o “Saccharomyces cerevisiae NCYC Sc 47” i “Saccharomyces cerevisiae CNCM I-4407”; 
Plural: straeniau bacterol
Notes: Daw'r testun cyd-destunol o Reoliadau Ychwanegion Bwyd Anifeiliaid (Awdurdodiadau) (Cymru) 2022.