D defs.my
Entry 1 sense Webster, 1913

Nonillion

· No·nil·lion · IPA
01 n. According to the French and American notation, a thousand octillions, or a unit with thirty ciphers annexed; according to the English notat…
  1. 1.
    According to the French and American notation, a thousand octillions, or a unit with thirty ciphers annexed; according to the English notation, a million octillions, or a unit with fifty-four ciphers annexed. See the Note under Numeration. See: Numeration