Definify.com
Webster 1913 Edition
Pachymeningitis
Pachˊy-menˊin-gi′tis
,Noun.
 [
Pachy- 
+ meningitis
.] (Med.) 
Inflammation of the dura mater or outer membrane of the brain. 
Definition 2025
pachymeningitis
pachymeningitis
English
Noun
pachymeningitis (uncountable)
- (medicine) Inflammation of the dura mater of the brain, or of the spinal cord.