(polyalphaolefin) A synthetic base oil used in the production of premium-quality lubricants.

Polyalphaolefin. The main component of synthetic lubricants.

Paranal Observatory

Palo Alto CA

Peripheral Analyze Order used in XPS to specify the file analze order

peripheral arterial occlusion. A disease which occurs when arterial blood flow is blocked to an extremity of the body by a clot. It usually occurs in the leg and is the result of underlying peripheral arterial disease, in which chronic fatty plaque buildup restricts blood flow.

Pao is the Cantonese word for bun. It may come in many forms. It can be as simple as plain bread or it may contain BBQ pork, vegetable pork, noodles, mushrooms and much more.

a hollow construction technique saving labor and materials; a caverned, honeycomb construction composed of several tiers of lava slabs or columns laid across the space between outer and inner retaining walls

Poly Alpha Olefin. May be used in the filter industry to test the effectiveness of air filters.

Property Accountability Officer

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Public Affairs Officer

Pressure at the airway opening, e.g., at the interface between the patient's airways and the end of the patient circuit, or the atmosphere.