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Definitions of arachnoid
  1. noun
    the middle of the 3 meninges

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  2. noun
    air-breathing arthropods characterized by simple eyes and four pairs of legs

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  3. adjective
    relating to or resembling a member of the class Arachnida
Definition that contains arachnoid
  • spinal anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting an anesthetic beneath the arachnoid membrane that surrounds the spinal cord
  • subdural below the dura mater but above the arachnoid membrane of the meninges
  • lumbar puncture removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes
  • spinal puncture removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes
  • myelogram X-ray film of the spinal cord and spinal nerve roots and subarachnoid space
  • spinal tap removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes
  • myelography roentgenography of the spinal cord to detect possible lesions (usually after injection of a contrast medium into the subarachnoid space)
  • spinal anaesthesia anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting an anesthetic beneath the arachnoid membrane that surrounds the spinal cord
  • subarachnoid space a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
  • spinal anesthesia anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting an anesthetic beneath the arachnoid membrane that surrounds the spinal cord
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