unmyelinated /un·my·eli·nat·ed/ (un-mi´ĕ-lĭ-nāt″ed) not having a myelin sheath; said of a nerve fiber.
unmyelinated
un·my·e·lin·at·ed ( n-m   -l -n  td)adj. Lacking a myelin sheath. Used of a nerve fiber. |
unmyelinated
[unmī′əlinā′tid]
Etymology: AS, un, not; Gk, myelos, marrow
describing a nerve fiber that is not coated with a myelin sheath. An unmyelinated fiber, lacking the whitish sheath, appears as gray matter in the brain.
unmyelinated
not having a myelin sheath.
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