- The rate of change of angular displacement with respect to time.角速度：角位移随时间变化的变化率
- midnight sun
- mid-ocean ridge
- Mid-Plains Community College
- midpoint
- midrange
- Midrash
- midrib
- midriff
- midriffs
- mid-rise
- mids
- midsection
- midsection
- midship
- midshipman
- midshipmen
- midships
- midsize
- midsized
- midsole
- midst
- Midstate College
- Mid-State College
- Mid-State Technical College-Marshfield
- Mid-State Technical College-Wisconsin Rapids