cardinal symptom n.
The primary or major symptom by which a diagnosis is made.
Here, indeed, lies properly the cardinal symptom of the whole wide-spread malady.
The French Revolution Thomas Carlyle
a system of coding navigational aids by shape, color, and number, according to their positions relative to navigational hazards.
a small, brilliantly colored red and blue characin fish, Paracheirodon axelrodi, native to tropical forest streams in Brazil and Colombia: a popular aquarium fish.
a basic and dominant characteristic, as greed or ambition, that, according to a theory developed by psychologist Gordon Allport (1936), controls the behavior of many people.
anything considered to be an important or characteristic virtue: Tenacity is his cardinal virtue. cardinal virtues, Ancient Philosophy. justice, prudence, temperance, and fortitude.