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periodicity Definition

pe·rio·dic·ity (pir′ē ə dis′ə tē)

noun pl. -·ties

  1. the tendency, quality, or fact of recurring at regular intervals
  2. Chem. the occurrence of similar properties in elements occupying similar positions in the periodic table

Etymology: Fr périodicité < période: see period

periodicity Usage Examples

Preposition: of

  • year: This cycle has a periodicity of 110,000 years, and affects the total amount of solar radiation reaching the Earth.
  • collection: Accrual status: A free text statement of accrual policy, accrual method and accrual periodicity of the collection.

Converse of object

  • show: Seed sown in pans of field soil showed no periodicity of emergence.
  • have: Restrictions: The solid under consideration must have lattice periodicity parallel to the surface.
  • give: It has been shown that convoluted elements offer a substantial reduction in band gap frequency of 42 % for a given lattice periodicity.
  • detect: To answer a question I raised above - no, you cannot detect this periodicity with your internal senses.
  • lack: What, then, are the physical properties of such structures lacking periodicity but with a hierarchical symmetry?
  • choose: During the savings phase, the member regularly deposits the amount he wishes at a chosen periodicity.

Adjective modifier

  • regular: How, then, does a regular periodicity emerge from the interaction of chaotic individuals?
  • chemical: Slide 14: Discovering Science Multimedia This is an example of a screen from a unit on chemical periodicity dealing with gases.
  • annual: His observations showed stars to move in small circles with annual periodicity.
  • natural: This is just a part of the author's natural periodicity.
  • similar: A part of the time-dependent variations observed in archaeomagnetic field models consists of episodic longitudinal drifts with a similar periodicity.
  • appropriate: However, we are uncertain as the appropriate periodicity and nature of the screening: how often, and what constitutes an adequate screening.

Modifies a noun

  • assumption: Moreover, the process of tapering rules out the possibility of the periodicity assumption distorting the estimate.
  • lattice: A feature of periodic operators is the connection between their spectra and the properties of the underlying periodicity lattice.

Noun used with modifier

  • accrual: Accrual status: A free text statement of accrual policy, accrual method and accrual periodicity of the collection.
  • lattice: Restrictions: The solid under consideration must have lattice periodicity parallel to the surface.
  • year: This underpins the 8 year periodicity in the transits of Venus.