TORRICELLIAN
Tor`ri*cel"li*an, a.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition