ARACHNIDA • FREE-TRANSLATOR.COM • Definition of Arachnida

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noun

Arachnida n. pl. (Zool.) One of the classes of Arthropoda. Note: They have four pairs of legs, no antennae nor wings, a pair of mandibles, and one pair of maxillae or palpi. The head is usually consolidated with the thorax. The respiration is either by trancheae or by pulmonary sacs, or by both. The class includes three principal orders: Araneina, or spiders; Arthrogastra, including scorpions, etc.; and Acarina, or mites and ticks.

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Etymology of 'Arachnida'

Collaborative International Dictionary of English 0.48

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Words linked to "Arachnida" : Scorpionida, class, order Opiliones, Acarina, order Araneida, class Arachnida, Araneae, arachnoid, Chelonethida, order Phalangida, order Pseudoscorpiones, order Uropygi, order Chelonethida, Pedipalpi, order Araneae, Uropygi, Pseudoscorpiones, Chelicerata, arachnid, Pseudoscorpionida, superclass Chelicerata, order Scorpionida, arachnidian, Araneida, order Pedipalpi, order Acarina, Opiliones