Noun
Torricellian vacuum
The vacuum in the Torricellian barometer.
The column of mercury fell downwards, leaving a Torricellian vacuum above. citation Scientific developments Key ideas and people that emerged from the 16th and 17th centuries: * First printed edition of Euclid's Elements in 1482. Source: Internet
The weight of the mercury creates a vacuum in the top of the tube known as Torricellian vacuum. Source: Internet