from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The ordinal number matching the number septillion in a series.
  • n. One of a septillion equal parts.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. The ordinal form of the number septillion
  • n. The person or thing in the septillionth position.
  • n. One of a septillion equal parts of a whole.

from The Century Dictionary and Cyclopedia

  • Last in a series of a septillion individuals: an ordinal numeral.
  • Being one of a septillion equal portions.
  • n. One of a septillion equal parts of anything.


septillion + -th (Wiktionary)



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