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nounthe middle of the 3 meninges
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nounair-breathing arthropods characterized by simple eyes and four pairs of legs
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adjectiverelating to or resembling a member of the class Arachnida
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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
- 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
- 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