phthalic anhydride

noun

: a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins

Word History

First Known Use

1855, in the meaning defined above

Time Traveler
The first known use of phthalic anhydride was in 1855

Dictionary Entries Near phthalic anhydride

phthalic acid

phthalic anhydride

phthalide

See More Nearby Entries 

Cite this Entry

“Phthalic anhydride.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phthalic%20anhydride. Accessed 22 Dec. 2024.

Copy Citation

Share

Medical Definition

phthalic anhydride

noun
: a crystalline cyclic acid anhydride C8H4O3 that is used especially in making alkyd resins and is a structural part of thalidomide

More from Merriam-Webster on phthalic anhydride

Britannica.com: Encyclopedia article about phthalic anhydride

Love words? Need even more definitions?

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

Popular in Grammar & Usage

See All

Point of View: It's Personal

Plural and Possessive Names: A Guide

What's the difference between 'fascism' and 'socialism'?

More Commonly Misspelled Words

Words You Always Have to Look Up
See All

Popular in Wordplay

See All

8 Words with Fascinating Histories

8 Words for Lesser-Known Musical Instruments

Birds Say the Darndest Things

10 Words from Taylor Swift Songs (Merriam's Version)

10 Scrabble Words Without Any Vowels
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
naughty or nice
Are you naughty or nice? Quiz He's making a quiz, and checking it twice...