'meningeal' originates from New Latin, specifically the word 'meningeus', where 'meninx' (Greek) meant 'membrane'.

'meningeal' changed from the New Latin/Medieval Latin form 'meningeus', ultimately becoming the modern English adjective 'meningeal' derived from Greek 'meninx'.

Initially, it meant 'relating to a membrane', and over time it evolved into the current specialized meaning 'relating to the meninges (the membranes covering the brain and spinal cord)'.