mac·​ro·​benthos | \ "+ \

Definition of macrobenthos

: the relatively large organisms living on or in the bottom of bodies of water

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!

Other Words from macrobenthos

macrobenthic \ "+ \ adjective

First Known Use of macrobenthos

1932, in the meaning defined above

History and Etymology for macrobenthos

macr- + benthos

Keep scrolling for more

Learn More about macrobenthos

Time Traveler for macrobenthos

Time Traveler

The first known use of macrobenthos was in 1932

See more words from the same year

Statistics for macrobenthos

Cite this Entry

“Macrobenthos.” Dictionary, Merriam-Webster, Accessed 9 Jul. 2020.

Comments on macrobenthos

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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!