To save this word, you'll need to log in.
\ ˈthī-ō- 
\
\Definition of thio acid
: an acid in which oxygen is partly or wholly replaced by sulfur
Keep scrolling for more
Keep scrolling for more
Comments on thio acid
What made you want to look up thio acid? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
A More Exception(al) Quiz
- Which of the following words is not a synonym for ‘a young person’?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Share thio acid
Time Traveler for thio acid
The first known use of thio acid was in 1876
See more words from the same year