Definition of episternum
1a : interclavicle b : any of several other sternal elements of similar origin or position (such as the presternum of a mammal or the epiplastron of a turtle)
2 : a lateral division or piece of a somite of an arthropod; specifically : the anterior sclerite of the pleuron of an insect — compare epimeron
3 : manubrium 1a
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.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of episternum
New Latin, from epi- + sternum
Seen and Heard
What made you want to look up episternum? Please tell us where you read or heard it (including the quote, if possible).