ten-millionth

1. not comparableThe ordinal form of the number ten million.

plural ten-millionths

1. One of ten million equal parts of a whole.

   The average size of the pores in this barrier was about four ten-millionths of an inch, that is to say, .0000004 inches.

   1945 December 23, “Topics of The Times; Crucial Decimal Points”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 17 Nov 2025

   2 more examples

   In the first ten-millionths of a second after the Big Bang, the universe was composed of what is known as a quark-gluon plasma, but that immediately condensed into the matter we now know.

   2012 June 27, Thomas H. Maugh II, “Physicists produce highest man-made temperature: 7 trillion degrees”, in Los Angeles Times, Los Angeles, Calif.: Los Angeles Times Communications, →ISSN, →OCLC, archived from the original on 09 Jan 2020

   It [the metre] was originally deemed to be one ten-millionth of the distance from the equator to the north pole, before being replaced by a platinum bar held in Paris.

   2018 November 3, Robin McKie, “The future of the kilo: a weighty matter”, in The Observer, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 03 Nov 2018

   Synonyms: croreth