plural noun sing. meninx me′·ninx′ (mē′niŋks′)
the three membranes that envelop the brain and the spinal cord: they are the dura mater, arachnoid, and pia mater
Etymology:
ModL, pl. of meninx < Gr mēninx (gen. mēningos), a membrane, akin to L membrum, member
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