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.

It is the first example in which scientists have confirmed exactly what is causing the periodic behavior.

From Science Daily • Jun. 2, 2026

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

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

From Science Daily • May 9, 2026

Reassured by his periodic whistles, I allow myself to drift farther away, and soon have two rabbits and a fat squirrel to show for it.

From "The Hunger Games" by Suzanne Collins

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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