limen
/ˈlaɪmɛn/Definitions
1. noun
In dentistry, the sensitive area at the gum line where the teeth and gums meet; a narrow opening or passage, especially one between two parts of a structure or system, such as the threshold of the ear or the limen of the eye.
“The dentist examined the limen of the patient’s tooth to check for any signs of decay.”
2. noun
A threshold or boundary, especially of the mind or consciousness, beyond which a person is aware of something or has a particular feeling or reaction.
“The news of the accident was a limen for the community, marking a turning point in their collective grief and outrage.”