grand mal

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A form of epilepsy where the seizures are characterized as severe and involve spasms and unconsciousness. A formal medical term would be tonic-clonic seizures.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a seizure during which the patient becomes unconscious and has convulsions over the entire body
• noun epilepsy in which the attacks involve loss of consciousness and tonic spasms of the musculature followed by generalized jerking