Definition of "oneth" [oneth]

• 'first', or other ordinal derivatives of 'one', such as hundred-and-oneth or minus-oneth (adjective)
• A fractional part of an integer ending in one (noun)

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• "I can recall playing with this word as a child, and saying such things as twenty-oneth and twenty-twoth."
• "Certainly, the force of analogy from the usual -th ending has had an impact on the irregular first, second, and third, so we do find oneth and threeth as well."
• "“Forward, Onety-oneth!” cried I, in a voice of thunder."