PDH or 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 Party of Humanists (), a political party in Germany
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).