English > Arachnida: 1 sense > noun 1, animal| Meaning | 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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| Synonym | class Arachnida |
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| Member of | Chelicerata, superclass Chelicerata | spiders |
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| Members | Acarina, order Acarina | mites and ticks |
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| Araneae, order Araneae, Araneida, order Araneida | spiders |
| Chelonethida, order Chelonethida, Pseudoscorpionida, order Pseudoscorpionida, Pseudoscorpiones, order Pseudoscorpiones | false scorpions |
| Pedipalpi, order Pedipalpi, Uropygi, order Uropygi | whip scorpions |
| Phalangida, order Phalangida, Opiliones, order Opiliones | harvestmen |
| Scorpionida, order Scorpionida | true scorpions |
| arachnid, arachnoid | air-breathing arthropods characterized by simple eyes and four pairs of legs |
| Broader | class | (biology) a taxonomic group containing one or more orders |
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| Spanish | arácnidos |
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| Catalan | Arachnida |
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| Adjectives | arachnidian | relating to or resembling a member of the class Arachnida |
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