How to Use ultrafine in a Sentence

ultrafine

adjective
  • The dust contains ultrafine particles that can penetrate cells in the lungs and cause lung and heart disease.
    — Roland Pease, Science | AAAS, 20 Oct. 2020
  • Most cloth and paper masks, even those that fit well, are not designed to protect you from the ultrafine particles in wildfire smoke.
    — Natalie Wallington, Popular Science, 7 June 2023
  • They're made of ultrafine, long-staple organic cotton, with a weave that's on the heavier side giving them a bit of weight.
    — Scott Gilbertson, WIRED, 2 Nov. 2024
  • Vehicles with deeper swirl marks may require a more aggressive compound first, followed by an ultrafine compound.
    — Jack Keebler, Car and Driver, 6 May 2022
  • These ultrafine particles can translocate from people’s noses into their brains via the olfactory bulb, Casey said.
    — Alex Wigglesworth, Los Angeles Times, 29 July 2024
  • The river here is also flanked by 13 miles of ultrafine chain-link fence, meant to keep fish from other rivers from dumping into the channel above the fail-safe during floods.
    — Sarah Zhang, Discover Magazine, 18 Feb. 2012
  • During a facial, your facialist will typically use a a facial steamer—a steady stream of ultrafine steam—to help open your pores after cleansing.
    — Ariana Yaptangco, Glamour, 22 Dec. 2021
  • Uneven coffee grinds, with lots of ultrafine particles or giant boulders, will cause uneven extraction.
    — Matthew Korfhage, Wired News, 13 Aug. 2025
  • Its satin finish and ultrafine tip foster a smooth and precise glide across lids, while the waterproof formula ensures your work of art doesn’t budge, no matter the forecast.
    — Sarah Kinonen, Allure, 31 Jan. 2026
  • What’s most impressive is that it’s made from ultrafine merino wool — a high-quality material that’s soft to the touch — for only $50.
    — Jessie Quinn, Peoplemag, 25 Jan. 2024
  • The ultrafine bubbles can improve the delivery, absorption, and uptake of cells in many applications.
    — Kimberly Chin, Axios, 23 Oct. 2024
  • Some ultrafine particles even reach the brain, where they have been detected in human tissue and shown in animal models to travel along the olfactory nerve.
    — Bill Frist, Forbes.com, 18 Sep. 2025
  • One existing technique, for instance, takes over a week and requires specialized equipment to spin wheat proteins into ultrafine fibers, creating a film on which cells can grow.
    — Raleigh McElvery, Smithsonian Magazine, 29 Nov. 2021
  • On top of this, deeply inhaling ultrafine particles combined with chemicals used to enhance the taste of e-cigarettes is linked to serious lung disease.
    — Bryant Stamford, The Courier-Journal, 8 Feb. 2024
  • The aerosol can also contain cancer-causing chemicals, heavy metals and ultrafine particles that are damaging when inhaled deeply.
    — Maureen Groppe, USA TODAY, 2 Dec. 2024
  • Remove 99% of ultrafine particles while enjoying crisp music.
    — Gaby Keiderling, Vogue, 10 Oct. 2023
  • When heated, these siloxanes vaporize and condense into ultrafine particles, which are then floating around in the immediate air and are readily inhaled.
    — New Atlas, 23 Aug. 2025
  • Building on this promise, ultrafine precision isn’t the only benefit piezoelectric devices portend for the medical field.
    — Michael Ashley, Forbes, 18 May 2021
  • During that time, the city of Seoul suffered from unusually high concentrations of ultrafine dust that actually did come from China.
    — Dongwook Kim, Scientific American, 27 June 2022
  • MagicFiber, a popular brand of microfiber cloth that uses ultrafine fibers to clean glass without scratching the surface, offers a pack of six for $9 on Amazon.
    — New York Times, 29 Oct. 2021
  • The shade mimics the texture and flexibility of sturdy canvas but consists of ceramic compounds spun into ultrafine fibers and woven together for this unique purpose.
    — Dava Sobel, Discover Magazine, 26 Dec. 2011
  • The aerosol generated by vaping devices also contains ultrafine particles that can be inhaled deep into the lungs and cause chronic inflammation.
    — Katia Hetter, CNN Money, 28 May 2026
  • At Kasliwal’s Jaipur workshop, artisans begin the process by etching gold with ultrafine tools before applying paste-like pigment made from powdered glass and firing it all in a kiln.
    — New York Times, 1 Mar. 2023
  • Physicochemical characteristics and health impacts of ultrafine particles emitted from small home appliances equipped with heating coils and brushed motors.
    — Daniella Gray, MSNBC Newsweek, 9 Dec. 2025
  • Other potentially harmful byproducts from ionizers are formaldehyde and ultrafine particles.
    — NBC News, 14 May 2021
  • Antimicrobial fibers include ultrafine silver strands woven into the fabric, or a chemical treatment applied during the manufacturing process.
    — Maggie Slepian, Travel + Leisure, 5 Dec. 2023
  • An emerging area of chip design is 3D monolithic integration, which creates a high-rise of circuits built directly on top of one another, connected by a dense forest of ultrafine vertical wires.
    — Max Shulaker, IEEE Spectrum, 30 June 2016
  • The patch incorporates both microchannels for collecting sweat and an ultrafine nanoplasmonic structure—an optical sensor structure—that analyzes sweat components using light.
    — Hannah Millington, MSNBC Newsweek, 17 Sep. 2025
  • Ultrasonic Ultrasonic humidifiers use the latest technology to bring moisture to a room, utilizing high-frequency sound waves to turn the water in the reservoir into an ultrafine mist.
    — Bestreviews, The Mercury News, 25 Sep. 2024
  • Its specialists have developed an ultrafine dispersion solution of graphene with excellent fluidity along with electrical and thermal conductivity.
    — Nadezhda Kosareva, Forbes, 30 Dec. 2024

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

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