| Noun | 1. | order Pseudoscorpionida - false scorpions 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 false scorpion, pseudoscorpion - small nonvenomous arachnid resembling a tailless scorpion Chelifer, genus Chelifer - a genus of Chelonethida |