| DTD | diastrophic dysplasia; document type definition |
|---|---|
| DTH | delayed-type hypersensitivity; Diploma in Tropical Hygiene |
| EBDCT | Cockayne-Touraine type of epidermolysis bullosa dystrophica |
| ECL | emitter-coupled logic; enterochromaffin-like [type]; euglobin clot lysis |
| HIB | heart infusion broth; hemolytic immune body; Hemophilus influenzae type B [vaccine] |