periodicity

n.

定期，周期性；周律；

1. Periodicity of nuclear properties began to show up.
   原子核性质的周期性开始显示出来了。
2. The numbers are not intermixed accidentally but are subject to regular periodicity.
   这些数字不是杂乱无章的、不是偶然出现的,而是有规律的、周期性的。

Periodicity of extinctions in the geologic past
Intraday periodicity and volatility persistence in financial markets
Periodicity, directionality, and randomness: Wold features for image modeling and retrieval
Holocene periodicity in North Atlantic climate and deep-ocean flow southof Iceland
Work function of elements and its periodicity. J Appl Phys
The work function of the elements and its periodicity
The hydrophobic moment detects periodicity in protein hydrophobicity.
Carbon Structures with Three-Dimensional Periodicity at Optical Wavelengths
Catalytic nanoarchitectures--the importance of nothing and the unimportance of periodicity.
G1-specific cyclins of S. cerevisiae: Cell cycle periodicity, regulation by mating pheromone, and association with the p34 CDC28 pr...