n. [ Cf. F. excitabilité. ] 1. The quality of being readily excited; proneness to be affected by exciting causes. [ 1913 Webster ]

2. (Physiol.) The property manifested by living organisms, and the elements and tissues of which they are constituted, of responding to the action of stimulants; irritability; as, nervous excitability. [ 1913 Webster ]

a. [ L. excitabilis inciting: cf. F. excitable. ] Capable of being excited, or roused into action; susceptible of excitement; easily stirred up, or stimulated. [ 1913 Webster ]

n. being easily excited.
Syn. -- excitability, volatility. [ WordNet 1.5 ]

n. (Physiol.) An agent or influence which arouses vital activity, or produces increased action, in a living organism or in any of its tissues or parts; a stimulant. [ 1913 Webster ]

a. [ L. excitans, -antis, p. pr. of excitare: cf. F. excitant. ] Tending to excite; exciting. [ 1913 Webster ]

v. t. [ L. excitatus, p. p. of excitare. See Excite. ] To excite. [ Obs. ] Bacon. [ 1913 Webster ]

pos>n. [ L. excitatio: cf. F. excitation. ] 1. The act of exciting or putting in motion; the act of rousing up or awakening. Bacon. [ 1913 Webster ]

2. (Physiol.) The act of producing excitement (stimulation); also, the excitement produced. [ 1913 Webster ]

a. [ Cf. F. excitatif. ] Having power to excite; tending or serving to excite; excitatory. Barrow. [ 1913 Webster ]

n. [ L., one who rouses. ] (Elec.) A kind of discarder. [ 1913 Webster ]

a. [ Cf. F. excitatoire. ] Tending to excite; containing excitement; excitative. [ 1913 Webster ]