trillion

n. number equaling one thousand billions, one million millions, one followed by 12 zeros (in the U.S. and France); one followed by 18 zeros (in Great Britain and Germany)

Trillion may mean:Numbers Either of the two numbers (see long and short scales for more detail):1,000,000,000,000 (one million million; ; SI prefix tera) - increasingly common meaning in English language usage.1,000,000,000,000,000,000 (one million million million; ; SI prefix exa) - increasingly rare meaning in English language usage but frequent in many other languages.
See more at Wikipedia.org...

n. trillion, number equaling one thousand billions, one followed by 12 zeros; one followed by 18 zeros

n. trillion, number equaling one thousand billions; one followed by 12 zeros (in the U.S. and France); one followed by 18 zeros (in Great Britain and Germany)

(n.)
According to the French notation, which is used upon the Continent generally and in the United States, the number expressed by a unit with twelve ciphers annexed; a million millions; according to the English notation, the number produced by involving a million to the third power, or the number represented by a unit with eighteen ciphers annexed. See the Note under Numeration.