1. Popular name for the dried flowering leaves of Cannabis sativa, which are smoked as cigarettes, “joints,” or “reefers.” In the U.S., marihuana includes any part of, or any extracts from, the female plant. Alternative spellings are mariguana, marijuana.
The definition information for marihuana is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.