period {pîr'ē-əd}
  1. a length or portion of time.
  2. a distinct portion of time with particular characteristics.
  3. a major division of geological time, forming part of an era.
  4. a lesson in a school.
  5. (also menstrual period) a monthly flow of blood and other material from the lining of the uterus, occurring in women of child-bearing age when not pregnant.
  6. chiefly N. Amer. a full stop.
  7. Physics the interval of time between recurrences of a phenomenon

pink slip ... the period film