Septendecennial

//ˌsɛptəndɛˈsɛn.i.əl// adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Occurring every seventeen years; pertaining to or designating a seventeen-year interval. not-comparable, rare

    "The septendecennial emergence of Magicicada septendecim represents one of the most remarkable synchronized reproductive cycles in the animal kingdom, with entire broods surfacing after precisely seventeen years underground."

Synonyms

All synonyms
heptadecennial

Example

More examples

"The septendecennial emergence of Magicicada septendecim represents one of the most remarkable synchronized reproductive cycles in the animal kingdom, with entire broods surfacing after precisely seventeen years underground."

Etymology

From Latin septendec(im) (“seventeen”) + -ennial, after biennial, septennial, etc. By surface analysis, septen- + decennial.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.