PDH may refer to:
- Angiotensin-converting enzyme, an enzyme
- Plesiochronous digital hierarchy, in telecommunications networks
- Pound–Drever–Hall technique for stabilizing a laser's output
- Pyranose dehydrogenase (acceptor), an enzyme
- Pyruvate dehydrogenase, an enzyme
This disambiguation page lists articles associated with the title PDH.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: