meningioma

https://doi.org/10.1351/goldbook.11863
Firm, often vascular, tumor arising from the meninges of the brain or spinal cord.
Note: Meningiomas are slowly growing benign tumors and quite common.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 880 [Terms] [Paper]