from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The quality or state of being periodic; recurrence at regular intervals.
- n. The repetition of similar properties in chemical elements, as indicated by their positioning in the periodic table.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Recurrence of a woman's periods; menstruation.
- n. The quality of being periodic; tendency to recur at regular intervals.
- n. The quality of a function with a repeated set of values at regular intervals.
from the GNU version of the Collaborative International Dictionary of English
- n. The quality or state of being periodical, or regularly recurrent.
from The Century Dictionary and Cyclopedia
- n. Periodic character; habitual tendency or disposition to recur at stated intervals of time.
- n. In physical, the number of recurrences of a periodic motion, such as a vibration, in a unit of time; specifically, in electricity, the number of complete periods or cycles per second of an alternating or oscillating current: same as frequency. The usual electrical frequencies are 25 and 60 in the United States and 50 in Europe.
- n. In botany, the habit in a plant of adjusting its growth or the movements of its organs to regular changes in conditions (of light, heat, etc.), either annual or diurnal. Periodicity is also exhibited in some spontaneous movements not correlated with time of day or season. See phenology, sleep, 5, sensitive-plant, and periodic movement.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the quality of recurring at regular intervals
The Doppler shift periodicity is short and stronger.
4 There may be a longer term periodicity associated with troposheric temperatures, or 1998 marks the onset of a long period of warming.
Thomas Gradgrind, a man of facts and calculations, spoke as a representative of what modern philosophers would characterise, in the context of what is described as periodicity, as the modern age.
There is what is called periodicity in history; in every period what were the norms during that historical period?
Thus, the periodicity of the rate of consumption of prose-fiction corresponds with the periodicity which is found to occur in the conception rate and in sexual ecbolic manifestations.
Functional equation: A relation between the values of a function at different points, such as periodicity or symmetry.
There are many phenomenon which appear periodic, but which are actually random - I'm sure you could come up with a "periodicity" of volcanic eruptions using time series analysis as well.
Disadvantages: • Small loss in sampling precision • Potential "periodicity" problems
'periodicity' of the phenomenon, and no idea seems to have been entertained of the connection existing between the fall of shooting stars and the recurrence of certain days, until the prodigious swarm of shooting stars which occurred in North America between the 12th and 13th of November, 1833, and was observed by Olmsted and Palmer.
See, this function uses the wave height and periodicity to predict structural failure.
Wordnik is becoming a not-for-profit! Read our announcement here.