noun: (fluid mechanics) Initialism of positive displacement pump. [A pump which operates by periodically changing the volume of a cavity]
noun: (electronics) Initialism of plasma display panel.
noun: (informal) Abbreviation of pedophile. [(psychiatry, sexology) A person aged 16 years old or older who is mostly or only sexually attracted toward prepubescent children.]
noun: (Philippines) Initialism of Philippine Development Plan.
