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1. Easily excited.
2. Capable of responding to stimuli.

ex·cit′a·bil′i·ty, ex·cit′a·ble·ness n.
ex·cit′a·bly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.excitableness - being easily excitedexcitableness - being easily excited      
emotionalism, emotionality - emotional nature or quality
boiling point - being highly angry or excited; ready to boil over; "after an hour of waiting I was at the boiling point"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
Snagsby; "I was sure you would feel it yourself and would excuse the reasonableness of MY feelings when coupled with the known excitableness of my little woman.