Definition of cinchoninic acid
: a white crystalline acid C9H6NCOOH made by reaction of isatin and a pyruvic salt or by oxidation of cinchonine; 4-quinoline-carboxylic acid
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
“In Vino Veritas” and Other Latin Phrases to Live By
Top 10 Latin Phrases
Word of the Year 2021 | Vaccine
Our Word of the Year 'vaccine,' plus 10 more
Merriam-Webster's Words of the Week - Nov. 26
From the week ending 11/26/2021
What's the Past Tense of 'Green-light'?
Is the project green-lighted? Or greenlit?
Ask the Editors