PDH may refer to:
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Angiotensin-converting enzyme, an enzyme
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Plesiochronous digital hierarchy
The plesiochronous digital hierarchy (PDH) is a technology used in telecommunications networks to transport large quantities of data over digital transport equipment such as fibre optic and microwave radio systems. The term '' plesiochronous'' i ...
, in telecommunications networks
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Pound–Drever–Hall technique for stabilizing a laser's output
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Pyranose dehydrogenase (acceptor), an enzyme
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Pyruvate dehydrogenase
Pyruvate dehydrogenase is an enzyme that catalyzes the reaction of pyruvate and a lipoamide to give the acetylated dihydrolipoamide and carbon dioxide. The conversion requires the coenzyme thiamine pyrophosphate.
Pyruvate dehydrogenase is u ...
, an enzyme
{{Disambiguation