subclinical absence

n.

Transient impairment of thinking without overt manifestations, demonstrable only by psychological testing, and accompanied by an outburst of spike and wave complexes appearing at a rate of 3 per second on an electroencephalogram.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.