This definition appears very rarely
and is found in the following Acronym Finder categories:
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- Science, medicine, engineering, etc.
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We have 3 other definitions for MR3
in our Acronym Attic
Samples in periodicals archive:
The mission, dubbed Mercury-Redstone 3, only lasted 15 minutes and 28 seconds -- a blip in comparison to today's 15-day missions.
The mission, dubbed Mercury-Redstone 3, was made 23 days after The Soviet Union's Yuri Gagarin became the first man in space.