Pronunciation: (u-rak'nid), [key]
any wingless, carnivorous arthropod of the class Arachnida, including spiders, scorpions, mites, ticks, and daddy-longlegs, having a body divided into two parts, the cephalothorax and the abdomen, and having six pairs of legs, the front pair used as pincers. Cf. insect.
belonging or pertaining to the arachnids.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.