|grand mal See also petit mal a disorder of the central nervous system characterized by periodic loss of consciousness with or without convulsions. In some cases it is due to brain damage but in others the cause is unknown|
|[C16: from Late Latin epilēpsia, from Greek, from epilambanein to attack, seize, from lambanein to take]|
epilepsy ep·i·lep·sy (ěp'ə-lěp'sē)
Any of various neurological disorders characterized by sudden, recurring attacks of motor, sensory, or psychic malfunction with or without loss of consciousness or convulsive seizures.