undecillionth

U1N1D2E1C3I1L1L1I1O1N1T1H4

adjective

The ordinal form of the number undecillion

Scrabble 19
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Meanings

adjectiveundecillionth (not comparable)
  1. not comparableThe ordinal form of the number undecillion
nounundecillionth (plural undecillionths)

plural undecillionths

  1. The person or thing in the undecillionth position.
  2. One of an undecillion equal parts of a whole.

Origin

From undecillion + -th (ordinal suffix).

Full word history & related roots →
Cite this entry
APA

undecillionth. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/undecillionth

MLA

“undecillionth.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/undecillionth. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “undecillionth,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/undecillionth.

Source: undecillionth on Wiktionary, CC BY-SA 4.0.