FACT FIRST · ANALOGY SECOND
Pack-years
Factual definition
A cumulative smoking-exposure measure calculated as packs smoked per day multiplied by years smoked; for example, one pack daily for ten years is ten pack-years.
SATIRICAL ANALOGY — NOT A DEFINITION
A counter for a history that cannot be reset with a new calendar.
Related entries in the source book
These are reading links, not claims that the guide entry defines this term.