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Occurring without periodicity; irregular.

a′pe·ri·od′i·cal·ly adv.
a·pe′ri·o·dic′i·ty (-ə-dĭs′ĭ-tē) n.


1. not periodic; not occurring at regular intervals
2. (General Physics) physics
a. (of a system or instrument) being damped sufficiently to reach equilibrium without oscillation
b. (of an oscillation or vibration) not having a regular period
c. (of an electrical circuit) not having a measurable resonant frequency
ˌaperiˈodically adv
aperiodicity n


(ˌeɪ pɪər iˈɒd ɪk)

1. not periodic; irregular.
2. Physics. of or pertaining to vibrations or oscillations with no apparent period.
a`pe•ri•od′i•cal•ly, adv.
a•pe`ri•o•dic′i•ty (-əˈdɪs ɪ ti) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aperiodic - not recurring at regular intervals
periodic, periodical - happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust"
References in periodicals archive ?
Which contains N tasks and each task kl- will arrive aperiodically.
2]; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is the normalizing coefficient for the impulse current of the HVES, which varies aperiodically with time 1 [14].
Therefore, we are interested in the phenomenon where the position of the inner edge sometimes indicates an extremely large displacement toward the outer side only, which aperiodically occurs.
Paper [2] proposes a multi-resolution compression and query (MRCO) framework that supports data storage and network data compression in a wireless sensor network of the time and spatial domain to satisfy requirements that can inquire about detailed data of a particular area to allow users to analyze abnormal events aperiodically.