from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The threshold of a physiological or psychological response.
from the GNU version of the Collaborative International Dictionary of English
- n. a threshhold, especially the point where a psychological or physiological effect begins to occur.
from The Century Dictionary and Cyclopedia
- n. In experimental psychology and psychophysics, the threshold; the dividing line between noticeableness and unnoticeableness of stimulus.
- n. In anatomy, the portion of brain-substance situated between the base and the island of Reil.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the smallest detectable sensation
Latin līmen, threshold.(American Heritage® Dictionary of the English Language, Fourth Edition)