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Medical Term:


Pronunciation: per'e-od


  1. A certain duration or division of time.
  2. One of the stages of a disease, period of incubation, period of convalescence.
  3. Colloquialism for menses.
  4. Any of the horizontal rows of chemical elements in the periodic table.

[G. periodos, a way round, a cycle, fr. peri, around, + hodos, way]

See Also: stage, phase

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.