irritation

The act of irritating.

The condition of being irritated; vexation.

A source of irritation.

An inflammatory reaction of a bodily part.

The elicitation of a response to a stimulus in a plant or animal organ or tissue, especially in a nerve or muscle.

The act of irritating, or the state of being irritated; impatient or angry excitement; provocation; exasperation.

Stimulation; incitement; a stirring up to activity.

In physiology, the act of evoking some action, or change of state, in a muscle, nerve, or other living tissue, by some chemical, physical, or pathological agent; the state or action thus evoked.

The act of irritating, or exciting, or the state of being irritated; excitement; stimulation, usually of an undue and uncomfortable kind; especially, excitement of anger or passion; provocation; annoyance; anger.