Persisting for an extended period of time.
A durable woollen material formerly used for women's shoes.
The act or process of shaping footwear on a last.
Occurring at regular intervals.
Relating to the highest oxidation state of iodine; of or derived from a periodic acid.
Periodical.
Pertaining to the revolution of a celestial object in its orbit.
Relative to a period or periods.
Having repeated cycles.
For which any return to it must occur in multiples of k time steps, for some k>1.
Having a structure characterized by periodic sentences.