variants: or thi-

Definition of thia-

 (Entry 1 of 2)

: containing sulfur in place of carbon or regarded as in place of carbon usually in place of the methylene group −CH2thiacyclohexane thiadiazole thiazole — compare aza-, oxa-

Definition of thia- (Entry 2 of 2)

: thi- thiachroman

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for thia-

Combining form (1)

International Scientific Vocabulary, from thi- + -a-

Keep scrolling for more

Learn More about thia-

Statistics for thia-

Cite this Entry

“Thia-.” Dictionary, Merriam-Webster, Accessed 6 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Comments on thia-

What made you want to look up thia-? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Who Knew?

True or False

Test your knowledge - and maybe learn something along the way.

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

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