fish ladder

1. 1.

   a series of ascending pools providing a passage for salmon to swim upstream past a dam

   Broaderpassage

Questions about fish ladder

What does fish ladder mean?

fish ladder means "a series of ascending pools providing a passage for salmon to swim upstream past a dam".

Is fish ladder a common word?

fish ladder is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.