} } Cardio | Define Cardio at Dictionary.com

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a combining form meaning “heart,” used in the formation of compound words:
Also, especially before a vowel, cardi-.
< Greek kardio-, combining form of kardía
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for cardio
  • But the employees felt better about bosses who exercised, whether it was yoga, cardio or weight lifting.
  • The gym has a large stretching area, a selection of free weights and cardio machines that overlook the stern.
  • The large fitness center on the ship offers weight machines, treadmills and other cardio equipment.
  • The fitness center also has a gymnasium with cardio and weight training equipment.
  • It's annoying when people blather on while they're on the cardio machines.
  • cardio exercises are great because they exercise your heart.
  • The gym includes teaching areas, bouldering walls and fitness facilities for cardio and strength training.
British Dictionary definitions for cardio


combining form
heart cardiogram
Word Origin
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
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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
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cardio in Medicine

cardio- or cardi-

  1. Heart: cardiovascular.

  2. Cardia: cardiodiosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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