Emily Dickinson Lexicon

TRILL-ION, n. [tril'yun; a word formed arbitrarily of three, or Gr. τριτος, and million.]

The product of a million involved to the third power, or the product of a million multiplied by a million, and that product multiplied by a million; the product of the square of a million multiplied by a million. Thus 1,000,000 X 1,000,000 = 1,000,000,000,000, and this product multiplied by a million = l,000,000,000,000,000,000.