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Definition of Grand mal
1. Noun. Epilepsy in which the attacks involve loss of consciousness and tonic spasms of the musculature followed by generalized jerking.
2. Noun. A seizure during which the patient becomes unconscious and has convulsions over the entire body.
Definition of Grand mal
1. 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. ¹
¹ Source: wiktionary.com
Medical Definition of Grand mal
1. tonic-clonic seizure