Definition

A type of specialized cell found in certain aquatic animals, particularly in jellyfish and corals, that can inject toxins to capture prey or defend against threats.

Example

The cnida of the jellyfish can deliver a painful sting to unsuspecting swimmers.

Conversation

Did you know that jellyfish have a special cell called a cnida?

Really? I had no idea they had such unique cells.

Yeah, the cnida helps them sting their prey.

That's fascinating! Nature has some incredible adaptations.

Synonyms & Antonyms

Root Explanation

Cnida is derived from the Greek word "knidē" (κνίδη), meaning a stinging cell or nettle. The term refers specifically to the specialized cells found in cnidarians, such as jellyfish and corals, that are used for capturing prey and defense.

Memory Tip

Think of the Greek word for a stinging cell, 'knidē', to remember that 'cnida' refers to the stinging cells in jellyfish and corals.

Visually Confused Words