There are multiple definitions:

1. luteinizing hormone beta-subunit gene(English)

   • Hormone

2. lutropin subunit beta(English)

3. large hepatitis B [surface protein](English)

   • SHB, MHB
   • Hepatology
   • https://doi.org….1111/liv.14298

4. long head of biceps(English)

   • optimal treatment of its diseased tendon during rotator cuff repair remains a topic of debate: tenotomy or tenodesis
   • Surgery
   • https://doi.org…2891-016-1230-5