hundred-millionth

1. not comparableThe ordinal form of the number one hundred million.

   Synonyms: one-hundred-millionth

plural hundred-millionths

1. One of one hundred million equal parts of a whole.

   Old weighing instruments couldn’t even measure a mite (1/8750 ounce), much less a blanc, which would have been about a hundred-millionth of an ounce.

   1996 February 8, Charles Perry, “Measured Words”, in Los Angeles Times, Los Angeles, Calif.: Los Angeles Times Communications, →ISSN, →OCLC, archived from the original on 17 Nov 2025

   2 more examples

   The newer methods tell us quite definitely, for example, that the diameter of an atom of diamond (which. chemically speaking, happens to be but one of a number of forms of carbon) is 1.54 hundred-millionths of a centimeter, the centimeter being less than one-half inch.

   1925 June 14, Benjamin Harrow, “Atoms That Make the World; CONCERNING THE NATURE OF THINGS. By Sir William Bragg, F.R.S. […]”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 17 Nov 2025

   Imagine a beautiful stack of oranges (a stack that goes on forever and whose units are a couple hundred-millionths the size of a piece of fruit) and you'll get a feel for a crystal's internal structure.

   2010 May 10, “It’s crystal clear that volcanic ash is like cotton candy”, in The Washington Post, Washington, D.C.: The Washington Post Company, →ISSN, →OCLC, archived from the original on 17 Nov 2025

   Synonyms: one-hundred-millionth