Definition

A special organ found in some caterpillars that can be extended and releases a bad smell to scare away enemies.

Example

When threatened, the caterpillar extended its osmeterium to deter the bird.

Conversation

Did you know some caterpillars have a special defense mechanism called an osmeterium?

Really? What does it do?

It's this gland that can release a bad smell to scare off predators.

That's fascinating! Nature has some clever tricks, doesn't it?

Synonyms & Antonyms

Root Explanation

Osmeterium → It is derived from the Greek word "osme" (meaning smell) and the suffix "-terium" (indicating a place or device). The word "osmeterium" refers to a specialized organ or structure that produces a strong odor, typically found in certain insects for defense or communication.

Memory Tip

Think of 'smell' ('osme') and a 'place' or 'device' ('-terium') that produces it — that's why an osmeterium is an organ that emits a strong odor.

Visually Confused Words