One of them has bigger amplitude than the other, or their periodicity is different.
periodicity is the scientific name for the Harmony of the Spheres.
The record of daily periodicity given in Fig. 23 may be regarded as a typical example.
In science, as in morals and politics, there is absolutely no periodicity.
Between these limits it fluctuates in a somewhat irregular way, in which the property of periodicity is not conspicuous.
Art, like commerce and everything else, obeys the law of periodicity.
And so it happens that those oscillations of apperception are directly adjusted to the periodicity of the impressions.
We must now institute some inquiries as to 51 the causes of the periodicity of the spots.
periodicity characterizes the female organization, and developes feminine force.
The question of periodicity is so important that it overthrows most glacial hypotheses.
periodicity pe·ri·o·dic·i·ty (pĭr'ē-ə-dĭs'ĭ-tē)
The quality or state of being periodic; recurrence at regular intervals.
The tendency of chemical elements to have similar properties when arranged according to their atomic number.
The position of an element in the periodic table.