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Showing results for periodic. Search instead for photoperiodic.
Definitions

periodic

[peer-ee-od-ik] / ˌpɪər iˈɒd ɪk /
ADJECTIVE
at fixed intervals
Synonyms
STRONGEST
annual intermittent monthly occasional recurrent recurring regular repeated routine seasonal sporadic weekly yearly
STRONG
periodical
WEAK
alternate at various times centennial cyclic cyclical daily epochal every once in a while every so often fluctuating hourly infrequent isochronal isochronous on certain occasions on-again-off-again orbital perennial rhythmic serial spasmodic
Antonyms
STRONGEST
constant infrequent unusual
WEAK
continual irregular lasting permanent sporadic variable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While we all need periodic reminders that pierce through the monotony and horrors of the day, awe of nature and our fragile existence being paramount, we also need reminders that a better future is possible.

From Salon • Apr. 7, 2026

Northern California will then be left with only two refineries, both of which have suffered periodic problems.

From The Wall Street Journal • Mar. 19, 2026

Just under 100 ships have passed through the Strait of Hormuz since the start of March, according to data analysed by BBC Verify, despite periodic attacks on shipping in the area by Iranian forces.

From BBC • Mar. 19, 2026

It said analysis of periodic samples from shipments between 2023 and 2025 were "consistent with palm-derived waste", not palm oil.

From Barron's • Mar. 16, 2026

Because the properties repeated themselves periodically, the invention became known as the periodic table.

From "A Short History of Nearly Everything" by Bill Bryson