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diagnostician

American

[dahy-uhg-no-stish-uhn] / ˌdaɪ əg nɒˈstɪʃ ən /

noun

an expert in making diagnoses, especially a medical doctor.

diagnostician British

/ ˌdaɪəɡnɒsˈtɪʃən /

noun

a specialist or expert in making diagnoses

"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 diagnostician

First recorded in 1865–70; diagnostic + -ian

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.

She immediately comes off as a magisterial diagnostician and adept leader with bold plans to modernize the Pittsburgh Trauma Medical Hospital’s emergency care experience.

From Salon • Jan. 8, 2026

The 20th century’s most piercing diagnostician of societies—as V.S.

From The Wall Street Journal • Nov. 20, 2025

And she’ll learn that her son is dead, a trauma that turned her cold and made her unpopular at work and with patients, though no less super powerful a diagnostician — which she remains.

From Los Angeles Times • Jan. 9, 2025

Take a look and see how you can become your own best technical diagnostician.

From The Verge • Jun. 28, 2022

Farmer was normally a fast diagnostician, but he found himself stalling on his own case.

From "Mountains Beyond Mountains" by Tracy Kidder and Michael French

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