Cannabis, also known as marijuana, among many other names, refers to any number of preparations of the Cannabis plant intended for use as a psychoactive drug or for medicinal purposes. It is a herb that has been used throughout recorded history by humans for various purposes such as fiber, as a drug, as medicine, for oil and as food. Cannabis, also known as marijuana or ganja, is a psychoactive drug. The herbal form of the drug consists of dried mature flowers and subtending leaves of pistillate (female) plants. The major biologically active chemical compound in cannabis is delta-9-tetrahydrocannabinol, commonly referred to as THC. Humans have been consuming cannabis since prehistory, although in the 20th century there was a rise in its use for recreational, religious or spiritual, and medicinal purposes.