au·​ra·​mine | \ ˈȯrəˌmēn, -mə̇n \
variants: or less commonly auramin \ ˈ⸗⸗mə̇n \
plural -s

Definition of auramine

: a bright yellow ketonimine dye C17H22CIN3 of poor lightfastness and stability derived from diphenylmethane and used chiefly in coloring paper, in making pigments, in signal smokes, and as a fluorescent biological stain

called in full auramine O

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 auramine

International Scientific Vocabulary aur- (from Latin aurum gold) + amine; originally formed as German auramin

Keep scrolling for more

Learn More about auramine

Statistics for auramine

Cite this Entry

“Auramine.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2020.

Comments on auramine

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


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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!