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Definition of Croton oil
1. Noun. Viscid acrid brownish-yellow oil from the seeds of Croton tiglium having a violent cathartic action.
Medical Definition of Croton oil
1. Oil from the seeds of the tropical plant Croton tiglium (Euphorbiaceae), causes severe skin irritation and contains a potent tumour promoter (co-carcinogen), phorbol ester. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)