[ uh-nad-ruh-muh s ]
/ əˈnæd rə məs /


(of fish) migrating from salt water to spawn in fresh water, as salmon of the genera Salmo and Oncorhynchus (distinguished from catadromous).

Origin of anadromous

First recorded in 1745–55, anadromous is from the Greek word anádromos running upward. See ana-, -drome, -ous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for anadromous

British Dictionary definitions for anadromous


/ (əˈnædrəməs) /


(of fishes such as the salmon) migrating up rivers from the sea in order to breedCompare catadromous

Word Origin for anadromous

C18: from Greek anadromos running upwards, from ana- + dromos a running
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

Science definitions for anadromous


[ ə-nădrə-məs ]

Relating to fish, such as salmon or shad, that migrate up rivers from the sea to breed in fresh water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.