mega-


variant of megalo- (megalith); also the initial element in units of measure that are equal to one million of the units denoted by the base word (megahertz). Symbol: M
Also especially before a vowel, meg-.

Origin of mega-

combining form representing Greek mégas large, great

British Dictionary definitions for mega-

mega-

combining form

denoting 10 6 megawatt Symbol: M
(in computer technology) denoting 2 20 (1 048 576) megabyte
large or great megalith
informal great in importance or amount megastar

Word Origin for mega-

from Greek megas huge, powerful

Medical definitions for mega-

mega-

pref.

Large:megacephaly.
One million (106):megahertz.

Scientific definitions for mega-

mega-

A prefix that means:
Large, as in megadose, a large dose.
One million, as in megahertz, one million hertz.
220 (that is, 1,048,576), which is the power of 2 closest to a million, as in megabyte.