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English definition of “cardio-”

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prefix uk   /kɑː.di.əʊ-/ us    /kɑːr.di.oʊ-/ ( also cardi-)
of the heart: cardiovascular
Translations of “cardio-”
in Chinese (Traditional) 心臟的, 心臟病的…
in Chinese (Simplified) 心脏的, 心脏病的…
(Definition of cardio- prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of cardio-?
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