Definition of croton oil
: a viscid acrid fixed oil obtained from seeds of an Asian croton (Croton tiglium) formerly used as a powerful purgative but now used especially in pharmacological experiments as an irritant
First Known Use of croton oil
Medical Definition of croton oil
: a viscid irritating oil from an Asian plant of the genus Croton (C. tiglium) that has been used in folk medicine as a cathartic
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