cardio-

1.
a combining form meaning “heart,” used in the formation of compound words:
cardiogram.
Also, especially before a vowel, cardi-.
Origin
< Greek kardio-, combining form of kardía
British Dictionary definitions for cardio-

cardio-

combining form
1.
heart: cardiogram
Word Origin
from Greek kardia heart
Word Origin and History for cardio-

before vowels cardi-, word-forming element meaning "pertaining to the heart," from Latinized form of Greek kardia "heart" (see heart (n.)).

cardio- in Medicine

cardio- or cardi-
pref.

  1. Heart: cardiovascular.

  2. Cardia: cardiodiosis.