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

Keep scrolling for more

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
See More

Recent Examples on the Web: Adjective

Large, multi-drawer tool chests sit alongside more complicated diagnostic equipment. Rex Crum, The Mercury News, "Tesla, Evergreen Valley College partner to give students a START on their careers," 2 Aug. 2019 But more immediately, a partial solution would be the development of quick, cheap diagnostic tools that would allow an instant urine culture so a doctor could prescribe the right drug for UTIs. Matt Richtel, BostonGlobe.com, "Common infection builds defenses and puts millions at risk," 13 July 2019 Current diagnostic tools for Alzheimer’s, the most common form of dementia, can confirm the build-ups of misshapen amyloid-beta or tau, the hallmarks of the condition. Katherine Ellen Foley, Quartz, "Scientists may have found a better way to spot early signs of dementia: our eyes," 11 July 2019 The company, which also operates divisions that make medical diagnostic equipment and electronic components, closed Friday $117.03 a share, a record high. Ronald D. White, latimes.com, "This Hawthorne company finds security in border protection," 6 July 2019 Cries can also be used as preliminary diagnostic tools for problems like chromosomal abnormalities, or simply to identify common issues like colic. Emily Matchar, Smithsonian, "A Translator for Baby Cries? Yes, Please.," 2 July 2019 Nevertheless, in the next few years the tiny lenses will probably make their way into smaller, easier-to-manufacture sensors, diagnostic tools such as endoscopic imaging devices, and optical fibers. Alberto Moscatelli, Scientific American, "Tiny Lenses Will Enable Design of Miniature Optical Devices," 1 July 2019 Laptops, diagnostic equipment and tools were reported stolen between 3:49 June 16 and 7:31 June 17 from Wilkins Hyundai, 750 N. York St., by two men and a woman recorded on video surveillance equipment. Graydon Megan, chicagotribune.com, "Elmhurst police blotter: Ten charged with marijuana possession," 19 June 2019 Talk to a doctor or dietitian about your symptoms, and work with them (through blood work, allergy tests, and other diagnostic tools) to figure out if a specific dietary change might be what’s best for you. Christine Byrne, Outside Online, "Are Eggs Bad for You? The Verdict Is Still Out.," 15 June 2019

Recent Examples on the Web: Noun

The contract also will provide RTA with turn-by-turn navigation services, real-time location tracking and diagnostics showing when a vehicle is about to break down. Courtney Astolfi, cleveland.com, "RTA trains, buses could have free Wi-Fi by next year," 4 June 2019 The service will bring 4G cellular data to RTA trains and buses, which will be used to provide Wi-Fi for passengers and will power real-time location and vehicle diagnostics, messaging and turn-by-turn navigation for RTA staff. Courtney Astolfi, cleveland.com, "RTA board approves free passenger Wi-Fi," 18 June 2019 Physician patients received unnecessary pre-surgical diagnostic tests nearly 20% of the time, less than non-physicians but still much too often. Michael Hiltzik, latimes.com, "Doctors aren’t much better at picking the best medical treatments than laypersons," 8 July 2019 The division, which includes the Genentech subsidiary, generates around three-quarters of Roche’s total revenue, with the rest coming from its diagnostics business. Denise Roland, WSJ, "Roche Taps Genentech Chief to Lead Pharmaceuticals Division," 10 Dec. 2018 Today’s mechanics must be proficient with computer diagnostics and use of tools. Ron Hurtibise, sun-sentinel.com, "Auto mechanic shortage prompts hiring call from AutoNation," 24 June 2019 Now imagine turning all current static tests into dynamic tests with capabilities for stress testing by adding a fourth dimension to diagnostics—time. WSJ, "Is There a Limit to the Human Lifespan?," 24 June 2018 The new fund will make between 15 and 20 investments in companies developing new drugs, medical devices, diagnostics and tools, according to Bain Capital Life Sciences’ managing directors, Adam Koppel and Jeffrey Schwartz. BostonGlobe.com, "Bain Capital raises $900 million for life sciences fund," 13 June 2019 Ramona High School automotive student Jesus Chavira, a junior, agreed that having a modern car in the auto shop will help the students learn about diagnostics, electrical and sensor systems. Julie Gallant, Ramona Sentinel, "Ford donates car to Ramona High and hosts student tour," 5 June 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.

See More

First Known Use of diagnostic

Adjective

1625, in the meaning defined at sense 1a

Noun

1625, in the meaning defined at sense 1

Keep scrolling for more

Learn More about diagnostic

Statistics for diagnostic

Last Updated

11 Aug 2019

Look-up Popularity

Time Traveler for diagnostic

The first known use of diagnostic was in 1625

See more words from the same year

Keep scrolling for more

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

Keep scrolling for more

Comments on diagnostic

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

WORD OF THE DAY

a wrong name or inappropriate designation

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!