Definition

The front part of the head of certain worms, located just before the mouth.

Example

The prostomium helps the worm sense its environment as it moves through the soil.

Conversation

Have you ever studied the anatomy of an earthworm?

Not really, but I know they have a part called the prostomium.

Right! It's the section in front of the mouth, isn't it?

Exactly! It's fascinating how even small creatures have such interesting structures.

Synonyms & Antonyms

Root Explanation

Prostomium → It is formed from "pro-" (meaning before) and "stoma" (from Greek στόμα, meaning mouth). The word refers to a structure that is located in front of the mouth, particularly in certain invertebrates.

Memory Tip

Think of something that is located 'before' ('pro-') the 'mouth' ('stoma') — that's why prostomium refers to a part that is in front of the mouth.

Visually Confused Words