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.
A number represented as a 1 followed by twelve zeros (1,000,000,000,000) If you have a bucket that holds 100 thousand marbles, you would need 10 million of those same buckets to hold a trillion marbles! That's a lot of marbles
the number that is represented as a one followed by 18 zeros; "in England they call a quintillion a trillion"