Hiện nay

1. Calendar year - also CYR
2. Current Year
3. Cubic Yard - also cu yd
4. CYPRUS - also CYP and C
5. Cycle - also c, cyc, CC, CL and CE
6. Contract Year
7. Calm Yourself
8. Calender Year
9. Connecticut Yale
10. College Year
11. Company - also CO, COY, compNE, co. and comp.
12. Container yard
13. Copy - also C
14. Critical Year
15. Currency - also CUR, C and cur.
16. Cyanamide - also C
17. See ya - also CYA
18. Cycloheximide - also CHX, CH, CXM, CX, CHM, CHI, CYH, CYC, cyx and Cyclo
19. Cyclophosphamide - also cyc, ctx, cpa, CP, CPM, CyP, Cyclo, CPH, CPP, CC, CYPH and Cyclop
20. Cyproheptadine - also cyp, CPH and Cypro
21. Cylindrospermopsin - also CYN
22. Cyclosporin - also Cs, CSP and Cys
23. Cyclosporine - also csp, CS, Cys and Cyclos
24. Cypermethrin - also CYP and CP
25. Cytoplasmic - also cyt, ct, CP, c- and CA
26. Cytosolic - also Cyt
27. Cytoxan - also cyc and ctx
28. Cytology - also cyt and Cytol