The white matter is white because of the fatty substance (myelin) that surrounds the nerve fibers (axons). This myelin is found in almost all long nerve fibers, and acts as an electrical insulation.en have more white matter than females both in volume and in length of myelinated axons. At the age of 20, the total length of myelinated fibers in males is 176,000 km while that of a female is 149,000 km.
Gentle; pleasant; kind; soft; bland; clement; hence, moderate in degree or quality; -- the opposite of harsh, severe, irritating, violent, disagreeable, etc.; -- applied to persons and things; as, a mild disposition; a mild eye; a mild air; a mild medicine; a mild insanity.
The Latin word temperÄre, meaning â to make mild, â â to control, â or â to soften, â gives us the root temper. Words from the Latin temperÄre have something to do with mildness or control. To temper is to soften or make something less strong or difficult.