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floodway

[fluhd-wey]
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noun
  1. the channel and adjacent shore areas under water during a flood, especially as determined for a flood of a given height.
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Origin of floodway

First recorded in 1885–90; flood + way1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

floodway in Science

floodway

[flŭdwā′]
  1. A channel for an overflow of water caused by flooding.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.