tem·per·a·ment (tĕmprə-mənt, tĕmpər-ə-)
a. The manner of thinking, behaving, or reacting characteristic of a specific person: a nervous temperament. See Synonyms at disposition.
b. The distinguishing mental and physical characteristics of a human according to medieval physiology, resulting from dominance of one of the four humors.
2. Excessive irritability or sensitiveness: an actor with too much temperament.
3. Music See equal temperament.
[Middle English, from Latin temperāmentum, from temperāre, to temper; see TEMPER.]
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