SDH

SDH may refer to:

Science, medicine and technology

• L-sorbose 1-dehydrogenase, an enzyme
• Shubnikov–de Haas effect
• Sorbitol dehydrogenase
• Subdural hematoma or subdural hemorrhage, brain bleeding
• Succinate dehydrogenase, in SDHA, SDHB, SDHC, SDHD
• Synchronous Digital Hierarchy, in telecommunications

Organizations and places

• Saradhna, code SDH, a railway station in India
• Social Democrats of Croatia
• Society for Digital Humanities
• Sydney Dental Hospital

Other

• The ISO 639 3 for the Southern Kurdish language
• Subtitles for the Deaf and Hard of hearing - see Subtitle (captioning)