lep to meningitis

(lep"to-men-in-ji'(je')tis) [G. leptos, thin, delicate 4- meninx(mening-), membrane, -f -it is.] Inflammation of the pia mater and arachnoid of the brain or spinal cord. exter'na, inflammation of the arachnoid, a rach nit is. 1. inter'na, inflammation of the pia mater.