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Definition of: arachnid
(ə·rak′nid) noun
Any of a class (Arachnida) of arthropods, embracing the spiders, scorpions, harvestmen, mites, etc. [<NL Arachnida <Gk. arachnē spider]
—a·rach·ni·dan (ə·rak′nə·dən) adjective & noun
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