English: HO
Welsh: swyddog preswyl
Subject: Iechyd
English definition: house officer - after 5 years at medical school students must spend one year in hospitals as House Officers.
Welsh definition: Ar ôl 5 mlynedd mewn ysgol feddygol rhaid i fyfyrwyr dreulio blwyddyn mewn ysbyty fel Swyddog Preswyl.