Definition of undiagnosable
: incapable of being diagnosed : not diagnosable an undiagnosable illness/problem
First Known Use of undiagnosable
Medical Definition of undiagnosable
: not capable of being diagnosed an undiagnosable complaint
Seen and Heard
What made you want to look up undiagnosable? Please tell us where you read or heard it (including the quote, if possible).