PD(redirected from Parkinson's Parkinson disease)
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Pd,symbol for the element palladiumpalladium
[Gr. Pallas, goddess of wisdom], metallic chemical element; symbol Pd; at. no. 46; at. wt. 106.42; m.p. 1,554°C;; b.p. 2,970°C;; sp. gr. 12.02 at 20°C;; valence +2, +3, or +4.
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PD(1) (Powered Device) See PSE and USB Power Delivery.
(2) See PD disc.
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