Torricellian vacuum

Sci-Tech Dictionary: Torricellian vacuum

(¦tör·ə¦chel·ē·ən ′vak·yəm)

(fluid mechanics) The space enclosed above a column of mercury when a tube, closed at one end, is filled with mercury and then placed, open end downward, in a well of mercury; this space is evacuated except for mercury vapor.

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