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Noun: Arachnida  u'rak-ni-du
  1. A large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings
    - class Arachnida

See also: arachnidian

Type of: class

Part of: Chelicerata, superclass Chelicerata

Encyclopedia: Arachnida

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