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trigger finger

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noun
any finger, usually the forefinger, that presses the trigger of a gun.
either forefinger, depending on which hand is dominant.
Pathology. difficulty in straightening or bending a ring finger, caused by inflammation and thickening of its tendon.
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Origin of trigger finger

First recorded in 1820–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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