1 A thick or coarse purÃ©e of fruit or vegetables. 2  The residue of cooked or uncooked fruit or vegetables after sieving or pressing out the juice. citrus pulp is sometimes used in manufactured orange drinks.  noun material produced from recycled paper, rags or ground wood, mixed with water, used for making paper.
Myelin sheath. (Science: anatomy, neurology) An insulating layer surrounding vertebrate peripheral neurons, that dramatically increases the speed of conduction. It is formed by specialised schwann cells, that can wrap around neurons up to 50 times.
myelin. the lipid substance forming a sheath (the myelin sheath) around the axons of certain nerve fibers; it is an electrical insulator that serves to speed the conduction of nerve impulses in these nerve fibers, which are called myelinated or medullated fibers. adj., adj myelinÂ´ic.yelinated nerve fibers occur predominantly in the cranial and spinal nerves and compose the white matter of the brain and spinal cord. It is the myelin sheath that gives the whitish color to the areas of white matter.