tippŭla (tip-), ae, f., an insect that runs swiftly over the water, the water-spider, water-spinner, Varr. ap. Non. 180, 11.
Transf., of any very light object: neque tippulai leonis pondu’st quam fides lenonia, Plaut. Pers. 2, 2, 62; v. Ritschl ad h. l.