Absence seizure means: Absence seizure is a seizure in the shape of a staring spell. A person appears to suddenly be “absent”. A brief loss of consciousness can occur with blinking and/or mouth twitching. An electroencephalogram EEG will show absence seizures as a distinctive sign.
(in Medical Dictionary)

What else does Absence seizure mean?

Generalized seizures are characterized by a temporary loss of consciousness, without convulsions and a generalized seizure. They occur mostly in children.
(in Merlin Dictionary)