Why do they call a Hemi a Hemi?

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Tags

1. #engine
2. #dating
3. #hemispherical
4. #hence
5. #shaped
6. #chrysler
7. #order
8. #being
9. #early
10. #within
11. #cylinder
12. #along
13. #powerhouse
14. #shape
15. #roots
16. #properly
17. #known
18. #pistons