a valve used to control and direct the flow of gases during positive crankcase ventilation.
Pejorative term for software full of PC-isms on a machine with a more capable operating system.
pulmonary capillary wedge pressure
filename extension A filename extension for images created with the IBM PC Paintbrush tool. [Format?] (1995-12-10)
Symbol, Chemistry. 1. . 1. . 1. per diem. 2. Police Department. 3. Insurance. property damage. 1. per diem. 2. potential difference. abbreviation 1. paid 2. Also PD. per diem 3. potential difference Chemical symbol 1. palladium abbreviation (in the US) 1. Police Department Pd The symbol for the element palladium. PD abbr. prism diopter […]