Hydrachnidae

plural noun
Hy·​drach·​ni·​dae | \ -nəˌdē \

Definition of Hydrachnidae

in some classifications
: a large family of water mites (group Hydrachnellae) that includes all the common free-living mites of fresh water and a few parasites of the gills of mollusks and that is now usually broken up into numerous separate families

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!

History and Etymology for Hydrachnidae

New Latin, from Hydrachna, type genus (from hydr- + Greek achna, achnē foam, chaff) + -idae

Keep scrolling for more

Learn More about Hydrachnidae

Statistics for Hydrachnidae

Cite this Entry

“Hydrachnidae.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Hydrachnidae. Accessed 20 Jan. 2021.

Comments on Hydrachnidae

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

WORD OF THE DAY

Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

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