# MSR

> English word · Noun · frequency rank #58,217

## Definitions
1. Initialism of molten salt reactor.
2. Initialism of Mars Sample Return mission.
3. Mulder/Scully romance; a fanfic involving a romantic relationship between the characters Fox Mulder and Dana Scully of the The X-Files.
4. Such fan fiction collectively.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/msr