periodicity meaning

• Noun: periodicity  `pi(u)reeu'disitee
  1. The quality of recurring at regular intervals
     - cyclicity

  Derived forms: periodicities

  See also: cyclic, cyclical, noncyclic, noncyclical, periodic

  Type of: regularity

  Encyclopedia: Periodicity

• 
  [Medicine]
  The tendency of a phenomenon to recur at regular intervals; in biological systems,the recurrence of certain activities (including hormonal,cellular,neural) may be annual,seasonal,monthly,daily,or more frequently (ultradian). n pl -ties : the quality, state, or fact of being regularly recurrent or having periods ‹the periodicity of peptic ulcer is … characteristic of the disease —Jour. Amer. Med. Assoc.›
  

Examples

1. periodicity of nuclear properties began to show up.
2. circadian rhythms show persistent, stable periodicities of about 24 hours.
3. regular irregularities occur with constant periodicity and are usually associated with partial heart block.
4. in some cell lines there is a similar periodicity in changes of cell surface antigenicity or response to wheat germ agglutinin.
5. algorithm analysis of periodicity of relational matrix