| CR | calculation rate; calculus removed; calorie-restricted; cardiac rehabilitation; cardiac resuscitatio... |
|---|---|
| Cr | chromium; cranium, cranial; creatinine; crown |
| CRD | carbohydrate-recognition domain; chronic renal disease; chronic respiratory disease; child restraint... |
| CRL | cell repository line; Certified Record Librarian; complement receptor location; complement receptor ... |
| CRM | Certified Reference Materials; counting rate meter; cross-reacting material; crown-rump measurement |