: a compound of the general formula RCH=NN=CHR or R2C=NN=CR2 formed by the action of hydrazine on aldehydes or ketones

azine dye

2 of 2

noun (2)

variants or less commonly azine
plural -s
: any of a class of acid quinonoid-type dyes containing a paradiazine ring fused to one or more aromatic rings and used especially in dyeing wool, silk, paper, and leather and in coloring fats, oils, lacquers, and plastics
also : an oxazine or thiazine dye

Word History

First Known Use

Noun (1)

circa 1863, in the meaning defined above

Time Traveler
The first known use of azine was circa 1863

Browse Nearby Words

Cite this Entry

“Azine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/azine. Accessed 17 Jun. 2026.

Medical Definition

1
: any of numerous organic compounds with a nitrogenous 6-membered ring
2
: a compound of the general formula RCH=NN=CHR or R2C=NN=CR2 formed by the action of hydrazine on aldehydes or ketones

More from Merriam-Webster on azine

Love words? Need even more definitions?

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

More from Merriam-Webster