noun ter·phenyl \¦tər+\

Definition of terphenyl

  1. :  any of three isomeric crystalline hydrocarbons C6H5C6H4C6H5 that contain three benzene rings linked in ortho, meta, and para positions, that are obtained usually along with biphenyl from benzene, and that are used chiefly as industrial heat transfer media; also :  a mixture of two or all three of these hydrocarbons

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of terphenyl

International Scientific Vocabulary ter- + phenyl

Seen and Heard

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


quaintly unconventional or refined

Get Word of the Day daily email!