Definition of "diagnostic" []

• Of, relating to, or used in a diagnosis. (adjective)
• Serving to identify a particular disease; characteristic. (adjective)
• The art or practice of medical diagnosis. Often used in the plural with a singular verb. (noun)
• A symptom or a distinguishing feature serving as supporting evidence in a diagnosis. (noun)
• An instrument or a technique used in medical diagnosis. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""We are still very much in what I call the diagnostic phase," Perez told the"
• ""We are still very much in what I call the diagnostic phase," he said, while declining to set a timetable or deadline for the inquiry."
• "GE Healthcare hopes to build a $1 billion business in diagnostic solutions for cancer and other diseases."