What is a circle with a line through it?

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Tags

1. #indicate
2. #enclosing
3. #prohibition
4. #right
5. #backslash
6. #universal
7. #bottom
8. #completely
9. #circle
10. #running
11. #known
12. #according
13. #diagonal
14. #through
15. #general
16. #something
17. #symbol
18. #official
19. #pictogram
20. #interdictory