English

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Etymology

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zillion +‎ -th

Pronunciation

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Adjective

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zillionth (not comparable)

  1. (informal) The ordinal form of the number zillion.

Noun

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zillionth (plural zillionths)

  1. (informal) The person or thing in the zillionth position.
  2. (informal) One of a zillion equal parts of a whole.