Arachnida A·rach·ni·da (ə-rāk'nĭ-də)
n.
A class of arthropods that includes spiders, scorpions, mites, and ticks.
| arachnida | |
noun | |
| a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings |
| a chattering or flighty, light-headed person. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |