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

This system came under strain in the 1960s “when the volume of U.S. dollars in circulation exceeded domestic gold reserves redeemable at fixed value, leading to periodic runs on the dollar in foreign exchange.”

From The Wall Street Journal • May 8, 2026

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

From Los Angeles Times • May 2, 2026

However, many management companies have a three- to five-year rule of periodic redecoration of an apartment to manage wear and tear, which includes painting.

From MarketWatch • Apr. 30, 2026

For most of us, the periodic table is a thing of beauty in the abstract, but for chemists it established an immediate orderliness and clarity that can hardly be overstated.

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

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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