The combining form "mega-" comes from the Greek "megas", great or big and means abnormally large. Examples include: Megalocephaly is too large a head. Megacardia is too large a heart. Megacolon is too large a colon.

SI prefix meaning "multiply by 106". For example, 3.2 MJ is 3200000 J.

before vowels meg-, word-forming element often meaning "large, great," but in precise scientific language "one million" (megaton, megawatt, etc.), from Greek megas "great, lar [..]

A prefix that multiplies a basic unit by 1,000,000 (10 to the sixth power).

Prefix meaning one million (106) or in computer usage, the similar value 1,048,576 (220). See Number Prefix Table.

Million

/me'g*/ [SI] pref. See {quantifiers}.

In decimal systems, the prefix mega means one million, but in binary systems, mega stands for 2 to the 20th power, or 1,048,576. One megabyte, therefore, is either 1,000,000 or 1,048,576 bytes (this i [..]

is a synonym for very large or great.

Adj. Fantastic, wonderful. [Orig. U.S. 1960s]

Abbreviation for one million.

Prefix that means 106, or one million.

prefix that multiplies a basic unit by 1,000,000 or 106.

Mega is a prefix that is used as a multiplier. The prefix mega is written as a uppercase "M" in front of the measure. In the "analog" world Mega represents the numeric value of 1,0 [..]

One million.

A metric prefix meaning 1,000,000 or 106.

     Prefix for units of measurement equal to millions (1,000,000 or 106).

large

large

A prefix meaning one million, 106; also MEG.

(informal) Very large. * '''2004''', Nigel Coates, ''Collidoscope: new interior design'' (page 26) *: Follow those in the know to the fifth floor of Sega's Joy Polis, a mega indoor amusement park [..]

Means "cloud" in Indonesian, ultimately from Sanskrit मेघ (megha).