EXCITABILITY

excitability, excitableness, volatility

(noun) being easily excited

excitability, irritability

(noun) excessive sensitivity of an organ or body part

Source: WordNet® 3.1

Etymology

Noun

excitability (countable and uncountable, plural excitabilities)

(uncountable) The state of being excitable

(countable) A measure of how easy something is to excite

Source: Wiktionary

Ex*cit"a*bil"i*ty, n. Etym: [Cf. F. excitabilité.]

1. The quality of being readily excited; proneness to be affected by exciting causes.

2. (Physiol.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition