Webster's 1828 Dictionary
TORRICELLIAN
a.Pertaining to Torricelli, an Italian philosopher and mathematician, who discovered the true principle on which the barometer is constructed. Torricellian tube, is a glass tube thirty or more inches in length, open at one end, and hermetically sealed at the other.
Torricellian vacuum, a vacuum produced by filling a tube with mercury, and allowing it to descend till it is counterbalanced by the weight of an equal column of the atmosphere, as in the barometer.
Webster's 1913 Dictionary
TORRICELLIAN
TORRICELLIAN Tor `ri *cel "li *an, a.
Defn: Of or pertaining to Torricelli, an Italian philosopher and mathematician, who, in 1643, discovered that the rise of a liquid in a tube, as in the barometer, is due to atmospheric pressure. See Barometer. Torricellian tube, a glass tube thirty or more inches in length, open at the lower end and hermetically sealed at the upper, such as is used in the barometer. -- Torricellian vacuum (Physics ), a vacuum produced by filling with a fluid, as mercury, a tube hermetically closed at one end, and, after immersing the other end in a vessel of the same fluid, allowing the inclosed fluid to descend till it is counterbalanced by the pressure of the atmosphere, as in the barometer. Hutton.
New American Oxford Dictionary
Torricellian vacuum
Torricellian vacuum |ˌtɔːrɪˈtʃɛlɪən, -ˈsɛlɪən | ▶noun a vacuum formed above the column of mercury in a mercury barometer.
Oxford Dictionary
Torricellian vacuum
Torricellian vacuum |ˌtɔːrɪˈtʃɛlɪən, -ˈsɛlɪən | ▶noun a vacuum formed above the column of mercury in a mercury barometer.
The Wordsmith Dictionary