any of a class (Diplopoda) of many-legged arthropods with an elongated body having two pairs of walking legs on each segment
See millipede in American Heritage Dictionary 4
or mil·le·pede(mĭlˈə-pēdˌ)
noun
Any of various crawling herbivorous myriapods of the class Diplopoda, found worldwide and having a cylindrical segmented body with two pairs of legs attached to all segments except for the first four in the thoracic region. Also called diplopod.