Definition

Describing a nerve fiber that does not have a protective covering called myelin.

Example

Unmyelinated nerve fibers conduct signals more slowly than myelinated ones.

Conversation

Have you ever heard of unmyelinated nerve fibers?

Yeah, I remember reading something about them in biology class.

It's interesting how they transmit signals slower than myelinated ones.

Definitely! That makes a big difference in how our nervous system functions.

Synonyms & Antonyms

Root Explanation

Unmyelinated → It is formed from "un-" (meaning not) and "myelinated" (from "myelin" derived from Greek "myelos", meaning marrow or spinal cord, and the suffix "-ated" indicating a condition). The word describes nerve fibers that are not covered with myelin, which is essential for efficient signal transmission.

Memory Tip

Think of 'not' ('un-') having a protective covering ('myelin') — that's why unmyelinated refers to fibers without that covering.

Visually Confused Words