What is the meaning of Venturi?

A venturi tube.

The throat of a carburetor, which is shaped so as to produce depressurization and swirling of the incoming air, allowing drops of fuel to be atomized (aerosolized).

A constriction in the flow of air to lungs.

masculine plural of venturo

inflection of ventūrus:

1. nominative/vocative masculine plural
2. genitive masculine/neuter singular

nominative/vocative masculine plural

genitive masculine/neuter singular

Source: wiktionary.org