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water locust

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noun
  1. a spiny tree, Gleditsia aquatica, of the legume family, native to the southeastern coastal U.S., having pinnate leaves, greenish-yellow, bell-shaped flowers, and long-stalked, thin pods.
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Origin of water locust

An Americanism dating back to 1800–10
Also called swamp locust.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018