Origin of mega-
Examples from the Web for meg
A few weeks later, Valentino and her pal, an aspiring actress named Meg Foster, met Cosby again at Café Figaro.Bill Cosby’s Long List of Accusers (So Far): 18 Alleged Sexual Assault Victims Between 1965-2004|Marlow Stern|November 24, 2014|DAILY BEAST
How did you arrive at Billy Crystal and Meg Ryan for the roles of Harry and Sally?
And then Meg sat down and did it, and she did it way better than anyone could have done.
Was there anyone else you thought of for the roles of Harry and Sally besides Billy Crystal and Meg Ryan?
But I crossed that bridge and we agreed to do it, and then we held auditions and Meg read with Billy.
Meg and Jan were busy in the day-nursery, making the little garments that were outgrown so fast.Jan and Her Job|L. Allen Harker
I have had to pledge the last pearl of the chaplet, but I knew that Meg would redeem it.'Stray Pearls|Charlotte M. Yonge
While she sat in the dark, Meg clenched her hands with the wild desire to kill George Sauls.Into the Highways and Hedges|F. F. Montrsor (Frances Frederica)
Meg had to ask where the tea was kept, and then they gathered round the table.
Meg stepped in and looked around; her glance was shy and somewhat fearful.
Word Origin for mega-
fem. proper name; before the late 20c. rise in popularity of Megan it typically was a pet form of Margaret, and was "used dial. to indicate a hoyden, coarse woman, etc." [OED]
before vowels meg-, word-forming element often meaning "large, great," but in precise scientific language "one million" (megaton, megawatt, etc.), from Greek megas "great, large, vast, big, high, tall; mighty, important" (fem. megale), from PIE *meg- "great" (cf. Latin magnus, Old English micel; see mickle). Mega began to be used alone as an adjective by 1982.
High-speed computer stores 2.5 megabits [headline in "Electronics" magazine, Oct. 1, 1957]