variants or less commonly adiabatic
ˌa-dē-ə-ˈba-tik How to pronounce adiabat (audio)
plural -s
: a curve or line plotted using coordinates selected to represent the pressure and volume or the temperature and entropy of matter during an adiabatic process

Word History


adiabat, back-formation from adiabatic, adjective; adiabatic, from adiabatic, adjective

First Known Use

1872, in the meaning defined above

Time Traveler
The first known use of adiabat was in 1872

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!

Dictionary Entries Near adiabat

Cite this Entry

“Adiabat.” Dictionary, Merriam-Webster, Accessed 24 Mar. 2023.

Love words? Need even more definitions?

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

Which Came First?

  • baby chick with a brown egg
  • hot take or cold shoulder?
True or False

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

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?