Meaning of person-year

per•son-year

Pronunciation: (pûr'sun-yēr"), [key]
— n.
  1. a unit of measurement, esp. in accountancy, based on an ideal amount of work done by one person in a year consisting of a standard number of person-days.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.