Meaning of CLASS ARACHNIDA

WordNet Dictionary
	Definition:		[n]  a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings
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	Synonyms:		Arachnida
	See Also:		Acarina, arachnid, arachnoid, Araneae, Araneida, Chelicerata, Chelonethida, class, Opiliones, order Acarina, order Araneae, order Araneida, order Chelonethida, order Opiliones, order Pedipalpi, order Phalangida, order Pseudoscorpiones, order Pseudoscorpionida, order Scorpionida, order Uropygi, Pedipalpi, Phalangida, Pseudoscorpiones, Pseudoscorpionida, Scorpionida, superclass Chelicerata, Uropygi