 |
503 | rd
Regimental Combat Team
| RD | |
| abbr. | rig down |
| abbr. electr.eng. | reference design |
| abbr. med. | Retinal Degeneration; Retinal Detachment; Reye Disease; Riley-Day; Rolland-Desbuquois; Raynaud disease |
| Rd | |
| abbr. | reader |
| polym. | Rockwell hardness D |