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 sheath. A Dictionary of Biology | 2004. Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. myelin sheath (medullary sheath) The layer of fatty material that surrounds and electrically insulates the axons of most vertebrate and some invertebrate neurons.The myelin sheath enables a more rapid transmission of nerve impulses (at speeds up to 120 mâs). It consists of layers of membrane derived from Schwann cells.yelin sheath. A Dictionary of Biology | 2004. Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. myelin sheath (medullary sheath) The layer of fatty material that surrounds and electrically insulates the axons of most vertebrate and some invertebrate neurons.