| CAS-REGN | Chemical Abstracts Service Registry Number |
|---|---|
| CIS | carcinoma in situ; catheter-induced spasm; central inhibitory state; Chemical Information Service; c... |
| CS | calf serum; campomelic syndrome; carcinoid syndrome; cardiogenic shock; caries-susceptible; carotid ... |
| CWS | cell wall skeleton; chest wall stimulation; child welfare service; cold water-soluble; cotton wool s... |
| DADS | Director Army Dental Service |