castor oil

noun

Definition of castor oil

  1. :  a pale viscous fatty oil from castor beans used especially as a cathartic and as a lubricant and plasticizer

Origin and Etymology of castor oil

probably from its former use as a substitute for castoreum in medicine


First Known Use: 1746


CASTOR OIL Defined for English Language Learners

castor oil

noun

Definition of castor oil for English Language Learners

  • : a thick oil made from a tropical plant and used in the past as a medicine


CASTOR OIL Defined for Kids

castor oil

noun cas·tor oil \ˈka-stər-\

Definition of castor oil for Students

  1. :  a thick yellowish liquid that comes from the seeds (castor beans) of a tropical herb and is used as a lubricant and as a strong laxative


Medical Dictionary

castor oil

noun

Medical Definition of castor oil

  1. :  a pale viscous fatty oil from castor beans used especially as a cathartic or lubricant


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