LH, Lh, or lh may stand for:
Science
- Luteinizing hormone, a hormone synthesized and secreted by gonadotropes in the anterior lobe of the pituitary gland
Places
Companies
- Lufthansa (IATA airline designator), the largest German airline
- LabCorp (ticker symbol, full name Laboratory Corporation of America Holdings), clinical laboratory company
- Lernout & Hauspie, a Belgium-based speech and language technology leader company
Culture
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