full-time equivalent

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A unit of measurement equal to one employee working a full-time job over a specified time period, used to determine statistics such as productivity per full-time employee or expenses per full-time employee, when the employment pool consists of both part-time and full-time employees.
• noun A similar unit used to determine statistics for a full-time student in a student population consisting of both part-time and full-time students.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The result of a calculation to estimate the effective size of a workforce that may include part-time workers.