thirtieth


thirtieth

adjective

  1. next after the twenty-ninth; being the ordinal number for 30.
  2. being one of 30 equal parts.

noun

  1. a thirtieth part, especially of one (1/30).
  2. the thirtieth member of a series.

adjective

  1. (usually prenominal)
    1. being the ordinal number of thirty in counting order, position, time, etc: often written 30th
    2. (as noun)the thirtieth of the month

noun

    1. one of 30 approximately equal parts of something
    2. (as modifier)a thirtieth part
  1. the fraction equal to one divided by 30 (1/30)

Middle English threttyth, from Old English þritigoða; see thirty + -th (1). Respelled 16c. to conform to new spelling of thirty.

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