Helly's fluid

Hel·​ly's fluid | \ ˈhelēz-\

Definition of Helly's fluid

: a fixing fluid consisting of an aqueous solution of mercuric chloride, potassium dichromate, sodium sulfate, and neutral formalin used in microscopy especially for preservation of the cytoplasm and mitochondria

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 Helly's fluid

after Konrad Helly, born 1875 Swiss pathologist

Keep scrolling for more

Comments on Helly's fluid

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


recurring in steady succession

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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!