seventeen-year locust

noun

Definition of seventeen-year locust

: a cicada (Magicicada septendecim) of the U.S. that lives most of its life as a wingless underground nymph and emerges from the ground after seventeen years in the North and after thirteen years in the South to spend only a few weeks as a winged adult

First Known Use of seventeen-year locust

1817, in the meaning defined above

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