There are multiple definitions:

1. lymph node(English)

   • mLN
   • Lymphatic system/lymphoma

2. lupus nephritis(English)

   • Nephrology

3. liquid nitrogen(English)

4. lichen nitidus(Latin)

   • a rare, chronic inflammatory, papular eruption, characterized by asymptomatic, pinhead-sized papules on neck, trunk, limbs, abdomen and penile shaft. It is often localized, but can be generalized
   • Dermatology, Pediatrics
   • https://doi.org…-9649.32.3.2386