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combustion tube
1. A glass, silica, or porcelain tube, that is resistant to high temperatures, which is a component of a combustion train.
2. A tube, resistant to high temperatures and usually composed of glass, silica, or porcelain.

It is used to hold samples during pyrolysis (decomposition of complex molecules by heat) or elemental (fundamental) analysis.

This entry is located in the following unit: -bust, -ust, -bur; bust-, bur-, ur- + (page 3)