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torr
This term is used almost exclusively in scientific, engineering, and vacuum technology contexts. It provides a precise measurement for low-pressure environments, where using standard atmospheres would result in cumbersome decimals.
As a standard unit of measurement, it is treated as an uncountable entity in technical documentation. It does not follow standard English pluralization patterns in formal scientific notation, remaining invariant regardless of the numerical value it modifies.
Meanings
Examples
The vacuum pump reduced the pressure in the chamber to 1 torr.
Check if the gauge reads exactly 10 torr before starting the reaction.
The pressure was maintained at a constant 50 torr throughout the experiment.
The pressure was maintained at a constant 50 torr throughout the experiment.
We need to reach a high vacuum of less than 10 inverse torr.
The boiling point of the liquid drops significantly at 100 torr.
The sensor measured a slight fluctuation of 0.5 torr.
The sensor measured a slight fluctuation of 0.5 torr.