Ir′ri-ta-ble, a.

a. [Fr. & Sp. irritable, It. irritabile, Lat. irritabilis, from irritare. See IRRITATE.] 1. Capable of being irritated. 2. Very susceptible of anger or passion; easily inflamed or exasperated; as, an irritable temper. 3. (Physiol.) Susceptible of irritation. See IRRITATION. In general, there is nothing irritable in the animal body but the muscular fibers. Heller.