Trillion (horse)
WordNet
adjective
(1) One million million in the United States
(2) One quintillion in Great Britain
noun
(3) The number that is represented as a one followed by 12 zeros
"In England they call a trillion a billion"
(4) The number that is represented as a one followed by 18 zeros
"In England they call a quintillion a trillion"
(5) A very large indefinite number (usually hyperbole)
"There were millions of flies"