blowpipe

(biology) A small tube, tapering to a straight or slightly curved tip, used in anatomy and zoology to reveal or clean a cavity.
(engineering) A long, straight tube, used in glass blowing, on which molten glass is gathered and worked. A small, tapered, and frequently curved tube that leads a jet, usually of air, into a flame to concentrate and direct it; used in flame tests in analytical chemistry and in brazing and soldering of fine work. blowtorch

In glass blowing, a long straight tube on which molten glass is gathered and worked, partly by blowing into the tube. The blowpipe is spun to shape the glass object further by centrifugal force, or by a tool, in which case the blowpipe acts as a spindle for turning.

In analytical chemistry, a blowpipe is a small, tapered, and frequently curved tube that directs a jet, usually of air, into a flame to concentrate the flame onto an unknown substance.

Coloration of the flame and other characteristic reactions in the reducing and in the oxidizing portions of the flame created by the blowpipe aid in identifying the substance. Such a blow-pipe may be blown directly by the analyst, from a bellows, or from a pressurized line.

A torch that employs gas-oxygen, or oxygen and acetylene, to melt metal in dental casting and soldering procedures.