septendecennial

形容词 adj.
中文释义

英文释义

形容词 adj.
  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.

词源

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