Definitions

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.

Its aging facilities, originally built between the 1930s and ’50s, require replacement rather than the periodic updates they’ve received.

From The Wall Street Journal • May 12, 2026

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

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

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Word Generation Science - Introductory Chemistry Concepts

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Essential English Vocabulary, List 3

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!