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Definition of: mega
1. Great; large; powerful: megaphone.
2. In the metric system, electricity, etc., a million, or a million times, as in the following:
megabar | mega–erg | megampere |
megacycle | megafarad | megavolt |
megadyne | megameter | megohm |
Also, before vowels, meg–. [<Gk. megas large]
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