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Children's Dictionary
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metric system a system of weights and measures that is based on the number ten.
metric ton a unit of weight equal to one thousand kilograms.
metronome a device that marks a regular period of time with a clicking sound. A metronome can be set at different speeds and is used by musicians to keep time during practice.
metropolis a large city.
metropolitan having to do with a large city and the communities around it.
mew1 a small cry made by a cat. [2 definitions]
Mexican of or having to do with Mexico or its people. [2 definitions]
Mexico a country in North America south of the United States. Mexico City is the capital of Mexico.
Mexico City the capital city of Mexico.
Mg symbol of the chemical element magnesium.
mg an abbreviation for milligram, or milligrams.
MI an abbreviation for Michigan.
mi the syllable that indicates the third tone of a musical scale.
mi. an abbreviation for mile, or miles.
MIA an abbreviation for "missing in action," used to describe members of the armed forces who became missing during a war.
mice plural of mouse.
Michigan a state of the north central United States. Its capital is Lansing. (abbreviated: MI) [2 definitions]
microbe A microbe is a tiny life form that can only be seen with a microscope. Many microbes are germs that cause disease.
microchip a tiny plate of silicon that holds many electronic parts. Microchips are used to run computers and other devices.
microcomputer a small computer that is designed for use by a single person. Microcomputers are used by small business and in homes. They are also known as personal computers.
microorganism any life form so small that it can only be seen with a microscope. Microorganisms include bacteria, viruses, and many protozoans.