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.

Ang’s results are driven mainly by taxes on dividends and on periodic capital gains within the index fund as its membership changed over time.

From The Wall Street Journal • May 29, 2026

If Temu does not comply, it faces periodic penalty payments.

From Barron's • May 28, 2026

Edmond Halley later became famous for identifying the periodic nature of the bright comet now officially called 1P/Halley.

From Science Daily • May 13, 2026

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

From Science Daily • May 9, 2026

“In general, I adhere to the notion that things belong in the class to which they have been assigned—which leads us to the periodic table. No, no more about the pelican.”

From "Okay for Now" by Gary D. Schmidt

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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