plural, 1610s, "the three membranes enveloping the brain and spinal cord," from Middle French meninges (1530s) or directly from medical Latin, plural of meninx, from Greek meninx (see meningitis).
meninges in Science
meninges
(mə-nĭn'jēz) The three membranes that enclose the vertebrate brain and spinal cord: the pia mater, arachnoid, and dura mater.