Standard Lemma guide

infradian

adj · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adj

Meaning 1

Cyclical with a periodicity significantly longer than 24 hours, that is, less frequent than circadian.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Uncertain. Possibly from the Latin infra (“below”) and diēs (“a day”) with the English suffix -an. Compare circadian, ultradian, and infra etc.