plural noun
Rha·​chit·​o·​mi | \ rəˈkitəˌmī, raˈk- \

Definition of Rhachitomi

: an order of Labyrinthodontia including most of the larger Permian amphibians and comprising forms having rhachitomous vertebrae, relatively stocky salamandriform bodies, and in some cases external gills

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 Rhachitomi

New Latin, from rachi- + -tomi (from Greek tomos cut, slice)

Keep scrolling for more

Learn More about Rhachitomi

Statistics for Rhachitomi

Cite this Entry

“Rhachitomi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Rhachitomi. Accessed 27 Oct. 2020.

Comments on Rhachitomi

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


Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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