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===Meaning===
[[File:TestTube.png|right|300px|thumb|A pair of '''test tubes'''.]]
A '''test tube''' is a glass container used as a container for small [[Volume (Space)|volumes]] of [[chemical]]s in [[Chemical Reaction|chemical reactions]]. ===About Test Tubes===: A '''test tube''' has a [[Volume (Space)|volume]] of around 9[[ml]].