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.
The myelin sheath acts as an insulating layer to prevent that electrical impulses from dissipating into the surrounding tissue. There are neurons without this insulating layer, and impulses travel at approx. 5m/sec. With a myelin sheath, impulses can travel upto 100 m/sec.