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

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

From Los Angeles Times • May 2, 2026

Concerns about the Fed’s transition or rising inflation could provoke periodic “spikes in bond volatility and/or funding market stress” but from Wilson’s perspective these will be manageable.

From MarketWatch • Apr. 27, 2026

Red Lobster has thrown its periodic Endless Shrimp party since the early 2000s.

From The Wall Street Journal • Apr. 20, 2026

Since that time, Jackie and Leila each had kept in periodic contact with the investigators, expecting little, getting even less.

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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