| DSM-III-R | Diagnostic and Statistical Manual of Mental Disorders [of APA], third edition, revised |
|---|---|
| L1, | L2, L3, L4, L5 first, second, third, fourth, and fifth lumbar vertebrae |
| LI, LII, | LIII first, second, third stage of syphilis |
| L/3 | lower third |
| M/3 | middle third |