millionth

[ mil-yuhnth ]

adjective

1. coming last in a series of a million.
2. being one of a million equal parts.

noun

1. the millionth member of a series.
2. a millionth part, especially of one (1/1,000,000).

millionth

/ ˈmɪljənθ /

noun

1. 1. one of 1 000 000 approximately equal parts of something
   2. ( as modifier )

      a millionth part

2. one of 1 000 000 equal divisions of a particular scientific quantity micro-
3. the fraction equal to one divided by 1 000 000

adjective

1. usually prenominal
   1. being the ordinal number of 1 000 000 in numbering or counting order, etc
   2. ( as noun )

      the millionth to be manufactured

Word History and Origins

Origin of millionth¹

First recorded in 1665–75; million + -th ²

Example Sentences

Nanoparticles are only a few millionths of a millimeter in size.

From Science Daily

The experiments the researchers used to find this effect involved shooting tiny particles of sapphire, just millionths of a meter across, at flat sheets of metal.

From Science Daily

It’s worth remarking that Maher’s terrible take on C.K. and effort to kick off the millionth pointless cancel culture debate took up just over a minute of a too-long podcast episode.

From Salon

The Cambridge-developed biocompatible devices -- just a few millionths of a metre thick -- are made using advanced photolithography and thin film deposition techniques, and require minimal power to function.

From Science Daily

I’d just picked up the latest Americaman comic to read for the millionth time when it happened—a bright green flash lighting up the sky outside the window.

From Literature