a. (sb.) Zool. [f. mod.L. Trāchēāri-a, neut. pl. + -AN.] Belonging to the order Trachearia of arachnids: see TRACHEATE a. b. sb. A tracheate arachnid.
1854. Bushnan, in Circ. Sc., I. Org. Nat., 77. The Trachearean Arachnidians … breathe … by means of air tubes opening upon the surface of the body, by which the air is conveyed to every part of the system.
