arroyo definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. arroyos
- a dry gully
- a rivulet or stream
Origin: Spanish ; from Classical Latin arrugia, shaft or pit (in a gold mine)
arroyo definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. ar·roy·os
- A deep gully cut by an intermittent stream; a dry gulch.
- A brook; a creek.
Origin: Spanish, from Vulgar Latin *arrugius, gold mine, underground passage, variant of Latin arrugia, a galleried mine.
arroyo - Science Definition
A small, deep gully or channel of an ephemeral stream. Arroyos usually have relatively flat floors and are flanked by steep sides consisting of unconsolidated sediments. They are usually dry except after heavy rainfall.