
Glassblowing is a glassforming technique that involves inflating molten glass into a bubble (or parison), with the aid of a blowpipe (or blow tube). A person who blows glass is called a glassblower, glassmith, or gaffer. A lampworker manipulates glass with the use of a torch on a smaller scale, such as in producing precision laboratory glassware o...
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http://en.wikipedia.org/wiki/Glassblowing

the practice of shaping a mass of glass that has been softened by heat by blowing air into it through a tube. Glassblowing was invented by Syrian ... [6 related articles]
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http://www.britannica.com/eb/a-z/g/36

the art or process of forming or shaping a mass of molten or heat-softened glass into ware by blowing air into it through a tube.
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https://www.infoplease.com/dictionary/glassblowing
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