ultrathin

adjective

ul·​tra·​thin ˌəl-trə-ˈthin How to pronounce ultrathin (audio)
: extremely or extraordinarily thin
ultrathin phones
ultrathin fashion models
The molecules ride on the surface like a film of soap and assemble themselves into an ultrathin layer about one-millionth of an inch thick.Mike May

Examples of ultrathin in a Sentence

Recent Examples on the Web However, previous research has shown that some ultrathin 2D materials could present a workaround, doubling performance compared with that of bulk 3D thermoelectric materials. IEEE Spectrum, 18 Jan. 2024 But mostly, the scientists hope to use the ultrathin imaging device to study fatty plaques in the blood vessels and take images of aneurysms. Courtney Linder, Popular Mechanics, 30 July 2020 Now a team of researchers have found a way to use coal to create ultrathin insulating films that could help launch a new era of semiconductors made with 2D materials. IEEE Spectrum, 24 Jan. 2024 Others have previously made stretchable circuits by depositing ultrathin layers of metal in weblike networks or serpentine patterns. IEEE Spectrum, 30 Nov. 2022 The Australian team uses ultrathin needles to inject embryos of the Aedes aegypti mosquito, the main carrier of the dengue virus, with the Wolbachia bacterium, an innocuous microbe present in 70 percent of all insect species. Linda Marsa, Discover Magazine, 4 Jan. 2012 The detector is essentially a pendulum—a molybdenum ring hanging on an ultrathin tungsten fiber—that feels the gravitational tug of two rotating molybdenum disks below. Steve Nadis, Discover Magazine, 26 July 2012 This device delivers a particularly close shave for an electric razor, thanks to its three blades and ultrathin foil (the layer of metal mesh that covers the blades). Abbie Kozolchyk, wsj.com, 12 Sep. 2023 Hopkins’ team discovered that blasting an ultrathin layer of carbon and water molecules on the plate’s surface is what caused the initial thermal drop. Darren Orf, Popular Mechanics, 2 Sep. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultrathin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1851, in the meaning defined above

Time Traveler
The first known use of ultrathin was in 1851

Dictionary Entries Near ultrathin

Cite this Entry

“Ultrathin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrathin. Accessed 19 Mar. 2024.

Medical Definition

ultrathin

adjective
ul·​tra·​thin ˌəl-trə-ˈthin How to pronounce ultrathin (audio)
: exceedingly thin
ultrathin sections for use in electron microscopy
Last Updated: - Updated example sentences
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