* Arachnid: Any member of the class Arachnida, which includes spiders, scorpions, ticks, and mites.
* Arachnology: The branch of zoology that studies arachnids.
* Arachnophobia: An extreme or irrational fear of spiders.
* Arachne: A skilled weaver in Greek mythology who was transformed into a spider by Athena.
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