ZOOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site arachnid A member of the class Arachnida, which contains scorpions, spiders, ticks, mites, and king crabs. Arachnids lack antennae, usually have four pairs of walking legs and with the exception of the king crab, Limulus, are air-breathing. Related category    • ZOOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP