Marijuana, or marihuana, is a name for the Cannabis (/ˈkænəbɪs/) is a genus of flowering plants in the family Cannabaceae. The number of species within the gen... More plant and more specifically a drug preparation from it. “Marijuana” as a term varies in usage, definition and legal application around the world. Some jurisdictions define “marijuana” as the whole cannabis plant or any part of it, while others refer to “marijuana” as a portion of the cannabis plant that contains high levels of tetrahydrocannabinol (THC, or Tetrahydrocaannabinol, is the chemical responsible for most of the marijuana’s psychoactive effects. It behave... More). Some jurisdictions recognize “marijuana” as a distinctive strain of cannabis, the other being ''Hemp'', the plant of the genus Cannabis or any part of the plant, whether growing or not, with a delta–9–tetrahydr... More.