a series of ascending pools constructed to enable salmon or other fish to swim upstream around or over a dam.
The Tastiest Names For The Most Disgusting MealsWhen you see mountain oysters on the menu, don’t expect a lovely plate of mollusks caught at the base of Black Mountain in San Francisco Bay.
Origin of fish ladder
An Americanism dating back to 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for fish ladder
There's more good water—two miles of it—to the east, and all it needed was a fish-ladder around Scaur Falls.The Flaming Jewel|Robert W. Chambers
British Dictionary definitions for fish ladder
a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012