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ninetieth

[nahyn-tee-ith] /ˈnaɪn ti ɪθ/
adjective
1.
next after the eighty-ninth; being the ordinal number for 90.
2.
being one of 90 equal parts.
noun
3.
a ninetieth part, especially of one (1/90).
4.
the ninetieth member of a series.
Origin
1100
before 1100; Middle English nyntithe, Old English nigenteotha. See ninety, -eth2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ninetieth
  • In ideal conditions, the main blossom appears around the ninetieth day from germination.
  • In this manner did he live from the fortieth or forty-second to the ninetieth year of his age.
  • ninetieth-birthday concerts, when they happen at all, are usually retrospectives.
  • Gladys showed me pictures from her ninetieth birthday party, the biggest get-together in the history of the family.
  • Sick leave accrues monthly and may be used as it accrues starting after the ninetieth day of employment.
British Dictionary definitions for ninetieth

ninetieth

/ˈnaɪntɪɪθ/
adjective
1.
(usually prenominal)
  1. being the ordinal number of ninety in numbering or counting order, position, time, etc. Often written: 90th
  2. (as noun): the ninetieth in succession
noun
2.
  1. one of 90 approximately equal parts of something
  2. (as modifier): a ninetieth part
3.
the fraction equal to one divided by 90 (1/90)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ninetieth

late 14c., nyntithe; see ninety + -th (1). Replaced Old English nigenteoþan.

Online Etymology Dictionary, © 2010 Douglas Harper
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12
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