n.; pl.Tracheae [ NL., from L. trachia, Gr. trachei^a (sc. &unr_; windpipe), from &unr_; rough, rugged: cf. F. trachée. ] [ 1913 Webster ]
1. (Anat.) The windpipe. See Illust. of Lung. [ 1913 Webster ]
2. (Zool.) One of the respiratory tubes of insects and arachnids. [ 1913 Webster ]
3. (Bot.) One of the large cells in woody tissue which have spiral, annular, or other markings, and are connected longitudinally so as to form continuous ducts. [ 1913 Webster ]
‖n. pl. [ NL. ] (Zool.) A division of Arachnida including those that breathe only by means of tracheae. It includes the mites, ticks, false scorpions, and harvestmen. [ 1913 Webster ]
‖n. pl. [ NL. ] (Zool.) An extensive division of arthropods comprising all those which breathe by tracheae, as distinguished from Crustacea, which breathe by means of branchiae. [ 1913 Webster ]
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