noun Physiology.
- an unusual or excessive degree of irritability or stimulation in an organ or tissue.
noun
- physiol an abnormally high degree of irritability or sensitivity in any part of the body
- psychiatry
- a personality disorder resulting from mercury poisoning
- an abnormal tendency to become aroused quickly, esp sexually, as the result of a verbal or psychic stimulus
n.
- Abnormal irritability or sensitivity of an organ or body part to stimulation.