pack-year (English, noun)
expansion: pack-year (plural pack-years)
Senses:
topics: lifestyle
medicine
sciences
smoking
glosses: 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.
Forms:
form: pack-years
tags: plural
form: pack year
tags: alternative