XPD

XPD is

• an abbreviation for the price of one troy ounce of palladium, see ISO 4217 # Other units
• an abbreviation for photoelectron diffraction (engl. x-ray photoelectron diffraction), see photoelectron spectroscopy
• the enzyme TFIIH-Helicase XPD
• the title of a spy novel by Len Deighton published in 1981

This is a disambiguation page for differentiating between several terms identified with the same word.