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.

This property is one reason the periodic table contains so many different elements.

From Science Daily • May 9, 2026

One simple solution could be to ask your landlord for periodic payments.

From MarketWatch • May 5, 2026

I always look forward to his periodic columns in the sports section.

From Los Angeles Times • May 2, 2026

Scotland has had periodic agreements for tenancies since 2017, but Wales and Northern Ireland still allow fixed-term contracts.

From BBC • Apr. 28, 2026

At the University of Kansas, the journalism school does a periodic “media fast,” in which students aren’t allowed to use their devices for twenty-four hours.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel

Vocabulary lists containing periodic

Freak the Mighty

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Word Generation Science - Introductory Chemistry Concepts

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Essential English Vocabulary, List 3

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