Meg- (?), Meg"a (?), Meg"a*lo- (?). [Gr. me`gas, gen. mega`loy, great.]
Combining forms signifying: (a) Great, extended, powerful; as, megascope, megacosm.
(b) Metric System, Elec.,
Mech., etc.
A million times, a million of; as, megameter, a million meters; megafarad, a million farads; megohm, a million ohms
.
© Webster 1913.