ul·​tra·​son·​ic | \ ˌəl-trə-ˈsä-nik How to pronounce ultrasonic (audio) \

Definition of ultrasonic

1 : having a frequency above the human ear's audibility limit of about 20,000 hertz used of waves and vibrations
2 : utilizing, produced by, or relating to ultrasonic waves or vibrations

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Other Words from ultrasonic

ultrasonically \ ˌəl-​trə-​ˈsä-​ni-​k(ə-​)lē How to pronounce ultrasonically (audio) \ adverb

Did You Know?

Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since the 1940s. Sonograms, the pictures produced by ultrasound, can reveal heart defects, tumors, and gallstones; since low-power ultrasonic waves don't present any risks to a body, they're most often used to display fetuses during pregnancy in order to make sure they're healthy. Ultrasonics has many other uses, including underwater sonar sensing. High-power ultrasonics are so intense that they're actually used for drilling and welding.

Examples of ultrasonic in a Sentence

Recent Examples on the Web

These are all controlled by Audi's zFas controller, which fuses sensor input from a while range of cameras, ultrasonic sensors, radars, and even a front-mounted lidar unit. Jonathan M. Gitlin, Ars Technica, "The 2019 Audi A7 might be all the car anyone ever needs," 24 June 2019 Then, there's always the option to get your own ultrasonic jewelry cleaning machine, as Stofenmacher suggests. Glamour, "How to Clean Your Engagement Ring at Home (and What Not to Do)," 21 June 2019 The blue and orange Polaris GEM maintenance vehicle is driving itself using the suite of radars, cameras, and ultrasonic sensors. Alex Davies, WIRED, "This Startup Wants to Remake the Last Mile of Parcel Delivery," 6 June 2019 Instead, Tesla relies on radar, along with eight cameras and ultrasonic sensors — which use sound waves — to send information to its vehicles’ computers. Levi Sumagaysay, The Mercury News, "Elon Musk calls lidar ‘stupid,’ but most self-driving cars use it. Who’s right?," 17 June 2019 There are even optional ultrasonic sensors housed in the mirrors that measure and report the water depth on the driver's touchscreen. Houston Chronicle, "Range Rover Evoque gets added finesse, mild-hybrid versions," 14 June 2019 Because the Honeywell is an evaporative humidifier (as opposed to an ultrasonic model), the water is pushed through a wick filter. Stephanie Shore Fisher, Country Living, "The Honeywell HCM350W Humidifier Is Single-Handedly Helping Me Survive the Winter," 12 Feb. 2019 This ultrasonic cool mist humidifier has an easy-to-control dial knob to control the output. Rachel Rothman, Good Housekeeping, "The Best Humidifiers to Buy This Winter," 20 Dec. 2018 Under ordinary circumstances, almost no-one hears ultrasonic signals. Robert Lee Hotz, WSJ, "Can Ultrasonic Noise Make You Sick?," 16 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ultrasonic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ultrasonic

1923, in the meaning defined at sense 1

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Last Updated

14 Jul 2019

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Time Traveler for ultrasonic

The first known use of ultrasonic was in 1923

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English Language Learners Definition of ultrasonic

used to describe sounds that are too high for humans to hear


ul·​tra·​son·​ic | \ -ˈsän-ik How to pronounce ultrasonic (audio) \

Medical Definition of ultrasonic

1a : having a frequency above the human ear's audibility limit of about 20,000 hertz used of waves and vibrations
b : utilizing, produced by, or relating to ultrasonic waves or vibrations removal of tartar with an ultrasonic scaler

Other Words from ultrasonic

ultrasonically \ -​i-​k(ə-​)lē How to pronounce ultrasonically (audio) \ adverb

More from Merriam-Webster on ultrasonic

Rhyming Dictionary: Words that rhyme with ultrasonic

Spanish Central: Translation of ultrasonic

Comments on ultrasonic

What made you want to look up ultrasonic? Please tell us where you read or heard it (including the quote, if possible).


a period when something is suspended

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