croton oil

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A brownish-yellow, acrid-smelling oil obtained from the seeds of a tropical Asian shrub or small tree (Croton tiglium) and formerly used as a purgative.

from The Century Dictionary.

• noun A vegetable oil expressed from the seeds of the Croton Tiglium. See Croton.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A dark yellow, acrid oil, obtained from the seeds of plants of the genus Croton, once used as a drastic purgative.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun viscid acrid brownish-yellow oil from the seeds of Croton tiglium having a violent cathartic action