- Mississippi, a state of the United States of America.
- manuscript, Manuscript.
- Master of Science.
- middle school, Middle School.
- Morphine. (Morphine Sulfate)
- multiple sclerosis, Multiple sclerosis, a chronic, inflammatory, demyelinating disease
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Etymology: Originally an 18th-century abbreviation of Mistress (compare Mrs); adopted by feminists from the 1970s onwards as a non-sexist title that does not reveal or assume the marital status of the woman to which it is applied, by analogy with Mr, which functions in this way
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