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Synonyms

diagnostics

American  
[dahy-uhg-nos-tiks] / ˈdaɪ əgˈnɒs tɪks /

noun

(used with a singular verb)

  1. the discipline or practice of diagnosis.

diagnostics British  
/ ˌdaɪəɡˈnɒstɪks /

noun

  1. (functioning as singular) the art or practice of diagnosis, esp of diseases

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of diagnostics

First recorded in 1660–70; see origin at diagnostic, -ics

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It also introduces a promising method for improving diagnostics in laser fusion research.

From Science Daily • May 1, 2026

Roche confirmed its full-year guidance after reporting a first-quarter rise in sales driven by high demand for its innovative medicines and diagnostics.

From The Wall Street Journal • Apr. 23, 2026

But by some measures waiting time are actually up - the number of patients waiting longer than the target times for both diagnostics and therapies has risen to the highest on record since 2024.

From BBC • Mar. 19, 2026

For example, it avoids providing coverage for anything related to medical diagnostics or applications focused on mental health.

From Barron's • Mar. 15, 2026

I spent the day running full diagnostics on every system in the Hab.

From "The Martian" by Andy Weir

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.