SINCE 1828
chromated copper arsenate
noun
chro·mat·ed copper arsenate
| \ ˈkrō-ˌmā-təd-
\
\
Definition of chromated copper arsenate
: a chemical combination of chromium, copper, and arsenic used to protect wood against insects and decay
Then, in the 1930s, scientists found a way to infuse wood with a solution that included copper (toxic to the fungi that cause rot) and arsenic (then the most common insecticide). To ensure the protection would last and builders and the environment wouldn't be hurt, they also added chromium. It triggered a chemical reaction that locked the pesticides into the wood. The formula became known as chromated copper arsenate, or just CCA. But the industry called it pressure-treated because the chemicals were injected under great pressure.— Curtis Rist
—abbreviation CCA
Keep scrolling for more
Comments on chromated copper arsenate
What made you want to look up chromated copper arsenate? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Farm Idioms Quiz
-
- What does 'poke' refer to in the expression 'pig in a poke'?
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
Share chromated copper arsenate
Resources for chromated copper arsenate