/ˈlīmən/
Noun, pl. limens, lamina
1. A threshold of a physiological or psychological response. (wikipedia.org)
2. Entrance; the external opening of a canal or space, such as limen insulae. (biology-online.org)
3. The smallest detectable sensation. (wordnetweb.princeton.edu)
Syn: threshold
Word origin: Latin word for “threshold, cross-piece, sill”