SINCE 1828
dictionary
thesaurus

tropaeolin

noun, often capitalized
Save Word
tro·​pae·​o·​lin
variants: or tropeolin \ trōˈpēələ̇n \
plural -s

Definition of tropaeolin

: any of several orange or orange-yellow azo dyes some of which (as methyl orange) are used as acid-base indicators or as biological stains

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 tropaeolin

1878, in the meaning defined above

History and Etymology for tropaeolin

International Scientific Vocabulary tropaeol- (from New Latin Tropaeolum) + -in

Learn More About tropaeolin

Time Traveler for tropaeolin

Time Traveler

The first known use of tropaeolin was in 1878

See more words from the same year

Dictionary Entries Near tropaeolin

Tropaeolaceae

tropaeolin

tropaeolum

See More Nearby Entries 

Statistics for tropaeolin

Cite this Entry

“Tropaeolin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tropaeolin. Accessed 26 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

fetter

Listen to the pronunciation of fetter

See Definitions and Examples »

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

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!

Words at Play
Ask the Editors
Word Games