| A and M |
abbreviation of "Agricultural and Mechanical." |
| a.m. |
abbreviation of "ante meridiem," which means "before noon" in Latin; the time between midnight and noon. |
| D.V.M. |
abbreviation of "Doctor of Veterinary Medicine." |
| M-1 |
the basic .30-caliber U.S. military rifle used in World War II and the Korean War, which is semiautomatic and uses a clip. |
| M-16 |
the basic U.S. military rifle used in the Vietnam War, which is fully automatic and uses small-caliber, high-velocity ammunition. |
| M.A. |
a degree earned in particular fields after one or two years of additional study following college. "M.A." is an abbreviation of "Master of Arts." |
| M.B.A. |
a degree earned in accounting or other areas of business after one or two years of additional courses following college. "M.B.A." is an abbreviation of "Master of Business Administration." |
| M.D. |
the abbreviation of the Latin words "medicinae doctor"; Doctor of Medicine. |
| M.O. |
abbreviation of "modus operandi" (Latin); method of operating. |
| M.P. |
abbreviation of "Member of Parliament." |
| M.S. |
abbreviation of "Master of Science," a master's degree awarded usu. in science, technology, or mathematics. |
| NM |
abbreviation of "New Mexico." |
| P.M. |
abbreviation of "Prime Minister," the chief minister and head of the cabinet in parliamentary governments. |
| p.m. |
the time between noon and midnight. P.M. is the abbreviation of "post meridiem," meaning "after noon" in Latin. [2 definitions] |
| Richard M. Nixon |
the 37th President of the United States (1969-1974), who supported but eventually discontinued U.S. involvement in the Vietnam War. President Nixon is credited with improving U.S. relations with China by making an historic trip to that country in 1972. Nixon is the only U.S. President to resign while in office (b.1913--d.1994). |