- neurofibrae postganglionicae SYN: postganglionic.
- neurofibrae preganglionicae SYN: preganglionic nerve fibers, under fiber.
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neu·ro·fi·bra (noor″o-fiґbrə) pl. neurofiґbrae [L.] [TA] nerve fiber or neurofiber: a slender process of a neuron; the term is often synonymous with axon. Nerve fibers are classified on the basis of the presence or absence of a myelin sheath as myelinated or unmyelinated. In the terminology for types of nerve fibers, the word nerve is frequently dropped; e.g., myelinated f's, unmyelinated f's, etc. For bundles or tracts of nerve fibers, see under bundle, fasciculus, lemniscus, tract, and tractus. Called also fiber and fibra.Medical dictionary. 2011.