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thousandth

[thou-zuh ndth, -zuh ntth, -zuh nth] /ˈθaʊ zəndθ, -zəntθ, -zənθ/
adjective
1.
last in order of a series of a thousand.
2.
being one of a thousand equal parts.
noun
3.
a thousandth part, especially of one (1/1000).
4.
the thousandth member of a series.
5.
Also, thousandth's place. (in decimal notation) the position of the third digit to the right of the decimal point.
Origin
1545-1555
1545-55; thousand + -th2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for thousandths

thousandth

/ˈθaʊzənθ/
adjective
1.
(usually prenominal)
  1. being the ordinal number of 1000 in numbering or counting order, position, time, etc
  2. (as noun): the thousandth in succession
noun
2.
  1. one of 1000 approximately equal parts of something
  2. (as modifier): a thousandth part
3.
one of 1000 equal divisions of a particular scientific quantity: millivolt, related prefix milli-
4.
the fraction equal to one divided by 1000 (1/1000)
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 thousandths

thousandth

adj.

1550s, from thousand + -th (1).

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for thousandths

18
18
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