Irritability

Origin

From Latin irritabilitas.

Full definition of irritability

Noun

1. The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper.
2. (physiology) A natural susceptibility, characteristic of all living organisms, tissues, and cells, to the influence of certain stimuli, response being manifested in a variety of ways.
• E. DarwinWe find a renitency in ourselves to ascribe life and irritability to the cold and motionless fibres of plants.
3. (medicine) A condition of morbid excitability of an organ or part of the body; undue susceptibility to the influence of stimuli.