Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

acenaphthylene

noun
ace·​naph·​thy·​lene | \ -thəˌlēn\
plural -s

Definition of acenaphthylene

: a yellowish crystalline hydrocarbon C12H8 made by dehydrogenation of acenaphthene

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 acenaphthylene

1877, in the meaning defined above

History and Etymology for acenaphthylene

International Scientific Vocabulary acenaphth- + -ylene

Keep scrolling for more

Learn More about acenaphthylene

Statistics for acenaphthylene

Look-up Popularity

Time Traveler for acenaphthylene

The first known use of acenaphthylene was in 1877

See more words from the same year

Comments on acenaphthylene

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

Show Comments  Hide Comments 

WORD OF THE DAY

apposite

Listen to the pronounciation of apposite

highly pertinent or appropriate

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time traveler quiz which word came first
  • Which came first?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

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