What does the three bar equal sign mean?

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Tags

1. #defined
2. #leaves
3. #analog
4. #resembling
5. #remainder
6. #equality
7. #clocks
8. #segments
9. #symbol
10. #horizontal
11. #known
12. #definition
13. #divided
14. #congruence
15. #equals
16. #equal
17. #denote
18. #three
19. #readers
20. #means