Test Your Vocabulary

Take Our 10-Question Quiz

Name That Thing

Take our visual vocab quiz

Test Your Knowledge »

True or False?

A quick quiz about stuff worth knowing

Take It Now »

Join Us on FB & Twitter

Get the Word of the Day and More

Facebook | Twitter

castor oil

2 ENTRIES FOUND:

castor oil

noun

Definition of CASTOR OIL

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

Origin of CASTOR OIL

probably from its former use as a substitute for castoreum in medicine
First Known Use: 1746

Browse

Next Word in the Dictionary: castor–oil plant
Previous Word in the Dictionary: Castoroides
All Words Near: castor oil

Seen & Heard

What made you want to look up castor oil? Please tell us where you read or heard it (including the quote, if possible).