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2 definitions by DragonFyre

 
1.
atm
A scientific measure of pressure equivalent to about 14.6959488 pounds per square inch. Abbreviation for "atmosphere." Its is a measurement of how much pressure the atmosphere exerts on an object at sea level (where the pressure would be 1 atm).
There is 2.5818 atm of pressure on that balloon, causing it to shrink from its original size when the pressure was 2 atm.
by DragonFyre August 19, 2005
911 391
 
2.
DHS
Abbreviation of "Department of Homeland Security"--the a US government agency devoted to maintaining the safety of America.
"Didn't you hear? The DHS got an 'F' on computer security last week... again."
by DragonFyre March 19, 2006
19 23