[mis-dahy-uh g-nohs, -nohz, mis-dahy-uh g-nohs, -nohz]

verb (used without object), mis·di·ag·nosed, mis·di·ag·nos·ing.

to make an incorrect diagnosis.

verb (used with object), mis·di·ag·nosed, mis·di·ag·nos·ing.

to diagnose erroneously: to misdiagnose the nation's ills.

Origin of misdiagnose

First recorded in 1925–30; mis-1 + diagnose
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for misdiagnose


verb (tr)

to diagnose (an illness or problem) wrongly or mistakenly
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

Word Origin and History for misdiagnose

1897, from mis- (1) + diagnose. Related: Misdiagnosed; misdiagnosing.

Online Etymology Dictionary, © 2010 Douglas Harper