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fish ladder

noun

  1. a series of ascending pools constructed to enable salmon or other fish to swim upstream around or over a dam.

fish ladder

noun

  1. a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams

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Word History and Origins

Origin of fish ladder1

An Americanism dating back to 1860–65

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Example Sentences

There's more good water—two miles of it—to the east, and all it needed was a fish-ladder around Scaur Falls.

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