myringotomyPronunciation: /ˌmɪrɪnˈdʒɒtəmi, -ˈgɒtəmi/Definition of myringotomy noun [mass noun] surgical incision into the eardrum, to relieve pressure or drain fluid. Origin: late 19th century: from modern Latin myringa 'eardrum' + -tomymyringotomy in other Oxford dictionaries Definition of myringotomy in the US English dictionary