Prostomium
- Pronunciation
- /proh-STOH-mee-um/
- Category
- Anatomy
- Singular
- Prostomium
- Plural
- Prostomia
Definition
A preoral, unsegmented portion of the body, anterior to the first true body segment. This is also known as the acron. Although often associated with annelids like earthworms, it is not typically a term used for caterpillars or other insects.
Etymology
Example
The prostomium of an earthworm plays a role in sensing its environment.