unmyelinated

/ʌnˈmaɪəlɪneɪtɪd/
adjective
  1. Describing a nerve fiber that lacks a myelin sheath, which slows the transmission of nerve impulses.
    • Unmyelinated nerves conduct signals more slowly than myelinated ones.
    • The doctor explained that unmyelinated axons are common in the autonomic nervous system.
    • Pain signals are often carried by unmyelinated fibers.
Antonyms
What does "unmyelinated" mean? | whatsthatwordmean | whatsthatwordmean