plural -s
: any of a group of bases that are ortho and para amino derivatives of diphenylamine and are usually formed by a molecular rearrangement of hydrazo compounds (as p -RC6H4NHNHC6H5p,p′-RC6H4NHC6H4NH2)

Word History


International Scientific Vocabulary semi- + benzidine

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 semidine

Cite this Entry

“Semidine.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2023.

Love words? Need even more definitions?

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