plural pleura -u̇rə How to pronounce pleuron (audio)
: a lateral part of a thoracic segment of an insect usually consisting of an epimeron and an episternum
: a lateral process of a somite of a crustacean between the tergum and sternum

Word History


New Latin, from Greek, rib, side; probably akin to Greek platys flat, broad

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 pleuron

Cite this Entry

“Pleuron.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2023.

Love words? Need even more definitions?

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