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term of art

noun
  1. a word or phrase that has a specific or precise meaning within a given discipline or field and might have a different meaning in common usage: Set is a term of art used by mathematicians, and burden of proof is a term of art used by lawyers.
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See also art1(def 9).
Also called word of art.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018