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English definition of “PCA”

PCA

noun uk   /ˌpiː.siːˈei/ us    // specialized
[U] abbreviation for patient controlled analgesia: a process in which patients suffering pain can control when and how they receive a drug to reduce their painAdministering drugs and medicines
[C] abbreviation for posterior cerebral artery: a blood vessel that supplies blood to the back of the brainThe circulatory system and blood
(Definition of PCA from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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