"precontractions" meaning in English

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          "text": "The electrophysiological measurements revealed that essential oil was more potent against K + (80 mM) than phenylephrine precontractions using isolated rabbit aorta preparations.",
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          "text": "The electrophysiological measurements revealed that essential oil was more potent against K + (80 mM) than phenylephrine precontractions using isolated rabbit aorta preparations.",
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