alkali blue


: any of various alkali-soluble triphenylmethane dyes that are essentially sodium salts of monosulfonic acids of phenylated pararosaniline and are used chiefly in making pigments
: any of the fairly permanent pigments made from an alkali blue dye and used chiefly in printing inks

Word History

First Known Use

1864, in the meaning defined at sense 1

Time Traveler
The first known use of alkali blue was in 1864

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 alkali blue

Cite this Entry

“Alkali blue.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

Love words? Need even more definitions?

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