pack-year
English
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editNoun
editpack-year (plural pack-years)
- (medicine, smoking) A unit for estimating the number of cigarettes a person has smoked previously; it is calculated by multiplying the average number of packs (each containing 20 cigarettes) the person smokes per day by the number of years the person has smoked.
Synonyms
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editunit for measuring the number of cigarettes a person has smoked previously
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