ARACHNIDA • FREE TRANSLATOR.ORG • 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" : Pseudoscorpiones, Opiliones, arachnoid, class, order Phalangida, Pseudoscorpionida, order Pedipalpi, order Uropygi, order Pseudoscorpionida, class Arachnida, Pedipalpi, superclass Chelicerata, arachnidian, arachnid, Araneae, Acarina, order Pseudoscorpiones, Chelicerata