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thousandth

American  
[thou-zuhndth, -zuhntth, -zuhnth] / ˈθaʊ zəndθ, -zəntθ, -zənθ /

adjective

  1. last in order of a series of a thousand.

  2. being one of a thousand equal parts.


noun

  1. a thousandth part, especially of one (1/1000).

  2. the thousandth member of a series.

  3. Also thousandth's place (in decimal notation) the position of the third digit to the right of the decimal point.

ˈthousandth British  
/ 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

"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

noun

    1. one of 1000 approximately equal parts of something

    2. ( as modifier )

      a thousandth part

  1. one of 1000 equal divisions of a particular scientific quantity

    millivolt

  2. 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

Etymology

Origin of thousandth

First recorded in 1545–55; thousand + -th 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In the Milky Way, only the central nucleus has star densities remotely comparable, and that region still contains only about one thousandth of the stars needed for the little-red-dot models.

From Science Daily

Lavreysen and Hoogland roared to the Olympic record over 200 meters with a time that was the exact same down to the thousandth of a second, putting them on opposite sides of the bracket.

From Seattle Times

He had been aiming to improve on his fourth-placed finish at Rio 2016 where he missed out on bronze by three thousandths of a second.

From BBC

That is equivalent to resolving a thousandth of the person’s height, which would require obtaining a megapixel image.

From Scientific American

But the German team came on strong at the end, and the margin was just 85 thousandths of a second, but the Chinese managed to hold on for their second consecutive gold medal.

From Seattle Times