Noun
The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants.
Source: Webster's dictionaryThe elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties. Dmitri Mendeleev
A news periodical differs from these mainly because of its periodicity. Source: Internet
Any periodicity at the edge is likely submerged in the Class III feedback from the jug volume. Source: Internet
Gratings with such small periodicity are called subwavelength gratings and exhibit special optical properties. Source: Internet
An objective basis for chemical periodicity would settle the questions about the location of hydrogen and helium, and the composition of group 3. Such an underlying truth, if it exists, is thought to have not yet been discovered. Source: Internet
For example, improper integrals may require a change of variable or methods that can avoid infinite function values, and known properties like symmetry and periodicity may provide critical leverage. Source: Internet