am·​phid·​ro·​mous | \ (ˈ)am¦fidrəməs \

Definition of amphidromous

of fishes
: migrating from fresh to salt water or from salt to fresh water at some stage of the life cycle other than the breeding period

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of amphidromous

1885, in the meaning defined above

History and Etymology for amphidromous

amphi- + -dromous

Keep scrolling for more

Learn More about amphidromous

Time Traveler for amphidromous

Time Traveler

The first known use of amphidromous was in 1885

See more words from the same year

Statistics for amphidromous

Cite this Entry

“Amphidromous.” Dictionary, Merriam-Webster, Accessed 9 Aug. 2020.

Comments on amphidromous

What made you want to look up amphidromous? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!