Definition

A strong protein that makes up hair, nails, and the outer layer of skin.

Example

Keratin is essential for the health and strength of our hair and nails.

Conversation

Did you know that our hair is made of keratin?

Really? I had no idea it was a protein.

Yeah, it's the same stuff that makes up our nails too.

That's interesting! I guess it makes sense since both are so strong.

Synonyms & Antonyms

Root Explanation

Keratin is derived from the Greek word "keratinos" (meaning horn-like), which comes from "keras" (meaning horn). The word refers to a type of protein that is a key structural component of hair, nails, and the outer layer of skin, resembling the toughness of horns.

Memory Tip

Think of the Greek word for horn ('keras') to remember that keratin is a tough protein found in hair and nails, similar to the hardness of a horn.

Visually Confused Words