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Definition of Venturi tube
1. Noun. A short tube inserted into a pipeline and used to measure the quantity of a liquid that is flowing in the pipeline.
Medical Definition of Venturi tube
1. A tube with a specially streamlined constriction to minimise energy losses in the fluid flowing through it while maximizing the fall in pressure in the constriction in accordance with Bernoulli's law; the basis of the Venturi meter. (05 Mar 2000)