English: otitis media
Welsh: llid y glust ganol
Subject: Iechyd
Welsh definition: Otitis media is an infection of the middle ear that causes inflammation (redness and swelling) and a build-up of fluid behind the eardrum.
Welsh context: Mae angen i ymdrechion i wella presgripsiynu ganolbwyntio'n benodol ar heintiau'r pibellau anadlu isaf ac uchaf, heintiau'r llwybr wrinol, llid y glust ganol a llid y sinysau.