Afiechyd Imiwnedd Diffygiol

== Welsh == === Alternative forms === AID (abbreviation) === Proper noun === Afiechyd Imiwnedd Diffygiol m acquired immune deficiency syndrome, AIDS ==== Synonyms ==== Syndrom Diffyg Imiwnolegol Caffaeledig Syndrom Diffyg Imiwnedd Caffaeledig === Mutation ===