Abbreviation of postage and handling. / Abbreviation of processing and handling.

(mining) The part of a plunger pump that contains the valve.

(astronomy) Fe/H (metallicity)

A shackle shaped like an H, or two Us joined together to give a waisted appearance, instead of the more usual single U shackle, or D-shackle.

(initialism) hematoxylin and eosin: a histological stain widely used in medical diagnosis

plural of H-shackle

(motorsports) Initialism of motor generator unit, heat. (an energy recovery system; a motor generator unit which harvests thermal energy from the exhaust via the turbocharger)

plural of h-word

plural of h bar

plural of H&P