Definition of pericardial septum
: a membrane separating the pericardium of an insect from the main body cavity and formed in part by the alary muscles
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!
Seen and Heard
What made you want to look up pericardial septum? Please tell us where you read or heard it (including the quote, if possible).