Entom. [ad. mod.L. type *trāchēola, dim. of TRACHEA: see -OLE.] A small or minute trachea or branch of a trachea (in insects). Hence Tracheolar a., pertaining to a tracheole, or consisting of tracheoles.
1904. Amer. Nat., Feb., 134. The tracheæ … pass over into the tracheolar network…. The term tracheoles … is used elsewhere in insect histology to designate fine tracheal branches not possessing spiral thickening.
