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TMSR 
Summary
TMSR may refer to
- Tera Mera Saath Rahe, 2021 Indian TV drama series
- Tera Mera Saath Rahen, 2001 Indian drama film
- The Most Serene Republic, Canadian indie rock music group
- a Thorium molten salt reactor
- TMSR-LF1, a pilot plant in China
- ThorCon nuclear reactor