cardiology

noun

car·​di·​ol·​o·​gy ˌkär-dē-ˈä-lə-jē 

: the study of the heart and its action and diseases

cardiological

ˌkär-dē-ə-ˈlä-ji-kəl 

adjective

cardiologist

ˌkär-dē-ˈä-lə-jist 

noun

Did you know?

The Heart of Cardiology

The root card- (closely related to cord) shows up in many heart-related words. Cardiologists frequently find themselves studying cardiograms, the charts of heart activity, made by machines called cardiographs. Heart attacks, and deaths caused by them, have both declined as a result of better medical emergency procedures, cholesterol-lowering drugs, and a decline in smoking. But the factors likely to actually improve heart health, such as better diets and more cardiovascular exercise (exercise, such as running, that improves the heart and blood vessels), haven't made any progress at all. So we should all be prepared to perform cardiopulmonary resuscitation (an emergency procedure done on someone whose heart has stopped, to get the heart and lungs working again).

Examples of cardiology in a Sentence

a doctor who specializes in cardiology

Recent Examples on the Web

Venkatesh Murthy, a professor of preventive cardiology at the University of Michigan, who has been critical of COVID-19 vaccines. — Beth Mole, ArsTechnica, 17 Sep. 2026

That level of light is quite dim—even lower than the ambient light that might peek into a bedroom from a hallway nightlight, according to Rasi Wickramasinghe, MD, PhD, FACC, chief of cardiology at Houston Methodist Sugar Land Hospital. — Stephanie Anderson Witmer, HEALTH, 17 Sep. 2026

The new hospital, which will include a modernized neonatal intensive care unit, intends to provide integrated care across gynecology, pregnancy, labor and delivery, menopause, and cardiology. — Catriona Marangi, CNBC, 15 Sep. 2026

The Sixth Medical Center of the Chinese PLA General Hospital, widely known as 301 Hospital, achieved this milestone in modern cardiology when its Senior Department of Cardiology performed this pioneering operation. — Mrigakshi Dixit, Interesting Engineering, 7 Sep. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1837, in the meaning defined above

Rhymes for cardiology

• anthology
• apology
• astrology
• biology
• christology
• chronology
• conchology
• cosmology
• cryptology
• cytology
• doxology
• ecology

Medical Definition

cardiology

noun

car·​di·​ol·​o·​gy ˌkärd-ē-ˈäl-ə-jē 

plural cardiologies

: the study of the heart and its action and diseases

cardiological

-ē-ə-ˈläj-i-kəl 

adjective

cardiologist

-ē-ˈäl-ə-jəst 

noun