Noun | 1. | ![]() animal order - the order of animals Arachnida, class Arachnida - a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings spider - predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey Argiopidae, family Argiopidae, orb-weaver - spiders that spin orb webs; cosmopolitan in distribution family Theridiidae, Theridiidae - a family of comb-footed spiders family Theraphosidae, Theraphosidae - large tropical spiders; tarantulas family Lycosidae, Lycosidae - wolf spiders Ctenizidae, family Ctenizidae - large burrowing spiders |