from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A pressure at which standardized measurements may be made, equal to 105 pascals or 1 atmosphere.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
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