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Pronunciation varies by accent · noun
(physics, dated) The standard atmospheric pressure used in certain physical measurements and calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris..
1880? William Thomson, 1st Baron Kelvin, Heat under a constant pressure of one atmo
In this case, at a pressure of one atmo, the quantity of gas absorbed by one gramme of water is .875 gramme at 0°C.
Now the above change of ratio is established at a pressure about 2.5/10⁶ atmo as given by log. dec., when the mean free path of a molecule of air ought to be about 10⁶ × .00001 ÷ 2.5 centim. or 4 centim., which is about the radius of the bulb.
Use atmo when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Atmo means (physics, dated) The standard atmospheric pressure used in certain physical measurements and calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
1880? William Thomson, 1st Baron Kelvin, Heat under a constant pressure of one atmo
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