pachymeningitis

noun
pachy·​men·​in·​gi·​tis | \ -ˌmen-ən-ˈjīt-əs How to pronounce pachymeningitis (audio) \
plural pachymeningitides\ -​ˈjit-​ə-​ˌdēz How to pronounce pachymeningitides (audio) \

Medical Definition of pachymeningitis

: inflammation of the dura mater