| IN | icterus neonatorum; impetigo neonatorum; incidence; incompatibility number; infundibular nucleus; in... |
|---|---|
| IPN | infantile polyarteritis nodosa; infectious pancreatic necrosis [of trout]; intern progress note; int... |
| LGN | lateral geniculate nucleus; lateral glomerulonephritis |
| LHN | lateral hypothalamic nucleus |
| LRN | lateral reticular nucleus |