dronabinol

[drō-năbə-nôl]
n.
  1. The principal psychoactive substance present in Cannabis sativa used therapeutically to control nausea and vomiting associated with cancer chemotherapy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.