Also known as: hd.
HD has various meanings in the Business & Finance category. Discover the full forms, definitions, and usage contexts of HD in Business & Finance.
The measure of the pressure of water expressed in feet of height of water1 psi = 2.31 feet of water. The measure of pressure at the base or other reference point of a column of fluid. Normally measured in feet of water. The product of the water's weight and a usable difference in elevation gives a measurement of the potential energy possessed by water.
Business & FinanceA cockpit system where data from flight instruments is projected onto a screen or the wind-screen so that the pilot can see it with-out having to look down.
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