- a combining form meaning “heart,” used in the formation of compound words: cardiogram.
Also especially before a vowel, cardi-.
Origin of cardio-
< Greek kardio-, combining form of kardía
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cardio
Some supporters keep pace, and others trail behind walking, there to observe Booker in the flesh more than for the cardio.The Ugly Truth About Cory Booker, New Jersey’s Golden Boy
October 20, 2014
Those carbs need to be burned with cardio, or else weight loss will plateau.
Depending on who you ask, cardio exercise is either the fountain of youth or the ticket to an early grave.
Their roster also includes Reformer, Power Tower, Cardio Chair, and many other Pilates-based classes.
Tone is their MegaFormer-based class, drawing from Pilates with a strength and cardio twist.
before a vowel cardi-
from Greek kardia heart
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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.)).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.