Blow″tube′ (�), n. 1. A blowgun. Tylor.
2. A similar instrument, commonly of tin, used by boys for discharging paper wads and other light missiles.
3. (Glassmaking) A long wrought iron tube, on the end of which the workman gathers a quantity of “metal” (melted glass), and through which he blows to expand or shape it; — called also blowing tube, and blowpipe.