1. lacking a myelin sheath around nerve fibers
Usage: medical; anatomy

Examples

• Nonmyelinated nerve fibers conduct impulses more slowly than myelinated ones.
• Pain signals are often transmitted through nonmyelinated C fibers.
• The autonomic nervous system contains many nonmyelinated axons.
• Nonmyelinated fibers appear gray in cross-section under a microscope.
• The researcher studied the differences between myelinated and nonmyelinated neurons.
• Nonmyelinated nerve endings are found in the skin and internal organs.