3 definitions found From The Collaborative International Dictionary of English v.0.48 [gcide]: Acarina \Ac`a*ri"na\, prop. n. pl. [NL., from Gr. ? a mite.] (Zool.) The order of Arachnida which includes the mites and ticks. Many species are parasitic, and cause diseases like the itch and mange. [1913 Webster] From The Collaborative International Dictionary of English v.0.48 [gcide]: Arachnida \A*rach"ni*da\, n. pl. [NL., fr. Gr. ? spider.] (Zool.) One of the classes of Arthropoda. See Illustration in Appendix. [1913 Webster] Note: They have four pairs of legs, no antenn[ae] nor wings, a pair of mandibles, and one pair of maxill[ae] or palpi. The head is usually consolidated with the thorax. The respiration is either by tranche[ae] 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. [1913 Webster] From WordNet (r) 2.0 [wn]: Acarina n : mites and ticks [syn: {order Acarina}]
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