Arachnida /Arach·ni·da/ (ah-rak´nĭ-dah) a class of the Arthropoda, including the spiders, scorpions, ticks, and mites.
A·rach·ni·da ( -r k n -d)n. A class of arthropods that includes spiders, scorpions, mites, and ticks. |
Arachnida
a class of animals of the phylum Arthropoda, including 12 orders, comprising such forms as spiders, scorpions, ticks and mites.
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