diagnostic

adjective
di·​ag·​nos·​tic | \ ˌdī-ig-ˈnä-stik How to pronounce diagnostic (audio) , -əg-\
variants: or less commonly diagnostical \ ˌdī-​ig-​ˈnä-​sti-​kəl How to pronounce diagnostical (audio) , -​əg-​ \

Definition of diagnostic

 (Entry 1 of 2)

1a : of, relating to, or used in diagnosis a diagnostic tool
b : using the methods of or yielding a diagnosis diagnostic tests
2 : serving to distinguish or identify a diagnostic feature

diagnostic

noun

Definition of diagnostic (Entry 2 of 2)

1 : the art or practice of diagnosis often used in plural
2 : a distinguishing mark

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Other Words from diagnostic

Adjective

diagnostically \ ˌdī-​ig-​ˈnä-​sti-​k(ə-​)lē How to pronounce diagnostically (audio) , -​əg-​ \ adverb

Noun

diagnostician \ ˌdī-​ig-​(ˌ)nä-​ˈsti-​shən How to pronounce diagnostician (audio) , -​əg-​ \ noun

Examples of diagnostic in a Sentence

Adjective

Ultrasound is now widely used as a diagnostic tool. One important diagnostic feature of this condition is a mild rash.

Noun

the thesis that moral decline is the infallible diagnostic of a decadent society
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Recent Examples on the Web: Adjective

In the late nineteen-sixties and early seventies, what today is called gender dysphoria didn’t have a diagnostic label. Jeremy Lybarger, The New Yorker, "Lou Sullivan’s Diaries Are a Radical Testament to Trans Happiness," 16 Sep. 2019 As in the first motion, Pattis said that Dulos has in his possession billing records that show $14,000 worth of medical tests, blood work and other diagnostic treatment from February through April of this year. Dave Altimari, courant.com, "Attorney for Fotis Dulos questions whether missing New Canaan woman Jennifer Farber Dulos was ill or may have been undergoing pregnancy testing," 10 Sep. 2019 What did any of this have to do with a routine diagnostic exam, anyway? Caroline Reilly, Teen Vogue, "Virginity Doesn't Mean You Can't Have a Transvaginal Ultrasound," 4 Sep. 2019 For years, efforts to find such an easily obtainable AD diagnostic biomarker in the blood came up empty. The Conversation, oregonlive.com, "Here’s what we know about blood tests for Alzheimer’s," 10 Aug. 2019 The Kaiser study looked at three years' worth of diagnostic and claims data from 2015 through 2017. Walecia Konrad, CBS News, "Wondering why health-care costs are so high? Blame it on the drugs," 2 Aug. 2019 Leary also says people have the illusion that likes are a diagnostic indicator of their actual social value or acceptance. Samantha Lauriello, Health.com, "Will the Instagram 'Like Ban' Reduce Anxiety? Here’s What Experts Think," 2 Aug. 2019 If a noninvasive test finds abnormalities, a diagnostic colonoscopy is needed to verify cancerous polyps. Julie Washington, cleveland.com, "Newer guidelines call for colonoscopies 5 years earlier, many insurances cover costs," 28 July 2019 The benefit also covers diagnostic services like x-rays and some lab testing. courant.com, "Community News For The West Hartford Edition," 26 Aug. 2019

Recent Examples on the Web: Noun

Instead, the report says eradication will rely on new drugs, diagnostics and insecticides in the pipeline to overcome the growing problem of resistance to malaria drugs and the insecticides used to impregnate things like bednets. Katie Hunt, CNN, "Can the world eradicate another disease?," 8 Sep. 2019 The contract also brings 4G cellular data to all RTA vehicles which will be used to power real-time location services, vehicle diagnostics and other technological improvements. Courtney Astolfi, cleveland.com, "Free Wi-Fi starts at several Cleveland RTA stations; connectivity coming to buses, trains," 13 Aug. 2019 The new repair certification program won’t just provide the hardware parts and tools necessary to fix iPhones, but also software and diagnostics tools. Wired, "Apple Will Give Indie Repair Shops the Tools to Fix iPhones," 29 Aug. 2019 The company is attempting to advance artificial intelligence in fields ranging from predictive diagnostics for kidney injuries to wind farm energy output. Sy Mukherjee, Fortune, "CVS Is Demolishing Wall Street Expectations. Here’s What That Means: Brainstorm Health," 7 Aug. 2019 The legislation aims to advance sustained efforts to combat valley fever, including streamlining the U.S. Food and Drug Administration approval process to establish new antifungal diagnostics, treatments and vaccines approved for use in humans. Stephanie Innes, azcentral, "Cases of valley fever in Arizona are up in 2019. Here's what you need to know," 10 July 2019 Each episode investigates eerie future-is-now realms of A.I.: autonomous weapons, medical diagnostics, smart robots, brain waves flying a simulated plane. Sarah Larson, The New Yorker, "Three Podcasts to Listen to in July," 9 July 2019 Initially, doctors believed his Achilles tendon was about to rupture but further diagnostics showed that a small piece of bone had broken off the back of his foot was getting pinches in the joint. Jim Ayello, Indianapolis Star, "Ex-Colts lineman Ryan Diem's injury could shed light on Andrew Luck's prognosis," 13 Aug. 2019 Experts at Wageningen University and the biotech company KeyGene, both in the Netherlands, used genome sequencing and molecular diagnostics to confirm the TR4 diagnosis in infected plant samples from Colombia. Sabine Galvis, Science | AAAS, "Colombia confirms that dreaded fungus has hit its banana plantations," 12 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diagnostic.' 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 diagnostic

Adjective

1625, in the meaning defined at sense 1a

Noun

1625, in the meaning defined at sense 1

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Statistics for diagnostic

Last Updated

22 Sep 2019

Look-up Popularity

Time Traveler for diagnostic

The first known use of diagnostic was in 1625

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More Definitions for diagnostic

diagnostic

adjective

English Language Learners Definition of diagnostic

technical : of, relating to, or used in diagnosis : used to help identify a disease, illness, or problem

diagnostic

adjective
di·​ag·​nos·​tic | \ -ˈnäs-tik How to pronounce diagnostic (audio) \
variants: also diagnostical \ -​ti-​kəl How to pronounce diagnostical (audio) \

Medical Definition of diagnostic

 (Entry 1 of 2)

1 : of, relating to, or used in diagnosis
2 : using the methods of or yielding a diagnosis a diagnostic service diagnostic properties

Other Words from diagnostic

diagnostically \ -​ti-​k(ə-​)lē How to pronounce diagnostically (audio) \ adverb

diagnostic

noun

Medical Definition of diagnostic (Entry 2 of 2)

: the art or practice of diagnosis often used in plural

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