| AIU | absolute iodine uptake; antigen-inducing unit |
|---|---|
| APUD | amine precursor uptake and decarboxylation |
| BUI | brain uptake index |
| DU | decubitus ulcer; density unknown; deoxyuridine; dermal ulcer; diagnosis undetermined; diazouracil; d... |
| FUT | fibrinogen uptake test; fucosyl transferase |