plural -s
: a colorless oily hydrocarbon (CH3)2CHC6H5 obtained by acid-catalyzed alkylation of benzene with propylene and used as an additive for high-octane motor fuel; isopropyl-benzene

Word History


International Scientific Vocabulary cum- + -ene; originally formed as French cumène

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!

Dictionary Entries Near cumene

Cite this Entry

“Cumene.” Dictionary, Merriam-Webster, Accessed 10 Dec. 2023.

Love words? Need even more definitions?

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