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Definition of diagnostic

diagnostic

/ˌdaɪ.əɡˈnɑː.stɪk/
di · ag · nos · tic

Adverb:diagnostically
•
Plural:diagnostics
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diagnostic Lexical Profile

diagnostic Game Scores & Validity

• adjective

1

Concerned with or serving to identify the nature or cause of an illness, condition, or other technical problem.

Example

"The hospital recently invested in advanced diagnostic imaging equipment to detect early-stage tumors."


2

Serving to distinguish or characterize a particular species, group, or phenomenon.

Example

"The presence of a notched beak is a diagnostic feature of this family of falcons."

Synonyms
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Antonyms
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• noun

1

A software program, test, or routine used to locate and identify faults in a computer system, network, or piece of machinery.

Example

"The technician ran a full system diagnostic to determine why the server kept crashing."


2

A distinctive symptom, characteristic, or clinical assay that aids in identifying a disease, disorder, or biological taxon.

Example

"Rapid molecular diagnostics have transformed how clinics screen for infectious diseases."

Synonyms
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• Rhymes for diagnostic

Word Origin & Etymology

Borrowed in the early 17th century from Ancient Greek diagnōstikós ('able to distinguish'), derived from diagnōsis ('discernment'), which combines dia- ('apart') and gignōskein ('to learn or know').

Cite this Entry


Wordmom. (2026). Definition of Diagnostic. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/diagnostic
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