noun: (mathematical analysis) Initialism of partial differential equation. [(calculus) A differential equation that involves the partial derivatives of a function of several variables.]
noun: (software) Initialism of plugin development environment.
noun: Initialism of pulse detonation engine. [A jet engine driven by repeated detonations within the engine.]
noun: (linguistics) Initialism of present-day English.
noun: (in street addresses) Abbreviation of parade. [(military) Synonym of military parade: A show of troops, an assembly of troops as a show of force, to receive orders, or especially for inspection at set times.]
