pachyleptomeningitis

Inflammation of all the membranes of the brain or spinal cord. [G. pachys, thick, + leptos, thin, + meninx (mening-), membrane, + -itis, inflammation]

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pachy·lepto·men·in·gi·tis .pak-i-.lep-tō-.men-ən-'jīt-əs n, pl -git·i·des -'jit-ə-.dēz simultaneous inflammation of the pia mater and dura mater

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pachy·lep·to·men·in·gi·tis (pak″e-lep″to-men″in-jiґtis) [pachy- + lepto- + mening- + -itis] inflammation of the dura and pia together.