| Subject | English | Thesaurus |
| abbr., law | A.F.D.C. | Aid to Families with Dependent Children |
| abbr., insur. | C. B.D | cash before delivery |
| abbr., textile | C/D | compression deflection |
| abbr., f.trade. | C.D. | cash deposit |
| abbr., textile | C/D | cut-off date |
| abbr., textile | C&D | collected and delivery |
| abbr., span. | C.D.L | conformidad de importación |
| abbr., f.trade. | C.D.P | circumferential diametral pitch |
| abbr., f.trade. | C.D.V. | current domestic value |
| abbr., law | C.O.D. | Cash on delivery/Collect on delivery |
| abbr., med. | D and C | dilatation and curettage |
| abbr., f.trade. | D/C | direct current |
| abbr., law | D.C. | district courts |
| abbr., textile | D&C brand | designer and character brand |
| abbr., textile | D&C Dyes | drugs and cosmetics dyes |
| abbr., insur. | D.O.C | endorsement drive other cars endorsement |
| abbr., insur. | D.O.C. | clause drive-other-cars clause |
| abbr., insur. | D.O.C. clause | drive-other-cars clause |
| abbr., insur. | D.O.C endorsement | drive other cars endorsement |
| abbr., auto. | D+R C | valve for direct and reverse clutch |
| abbr., f.trade. | e.c.d. | electron-capture detector |