cannabi-, cannab- +

(Greek: hemp; of or pertaining to hemp's chemical components or derivatives.)

cannabine
Pertaining to hemp; hempen.
cannabinoid
A chemical compound in cannabis, or marijuana. Tetrahydrocannabinol is one of the cannabinoids.
cannabinol
The parent compound of tetrahydrocannabinol (THC), the active principle of marijuana.
cannabis
1. Any of the preparations; such as, marijuana or hashish; or chemicals (as THC) that are derived from the hemp and are psychoactive.
2. The most commonly used illicit drug; considered a soft drug, it consists of the dried leaves of the hemp plant; smoked or chewed for euphoric effects.
3. Any plant of the genus Cannabis; a coarse bushy annual with palmate leaves and clusters of small green flowers which yields tough fibers and narcotic drugs.
4. Etymology: a plant genus named in 1728, from Greek kannabis, "hemp".

Cannabis is the botanical name for the plant from which marijuana comes. Its full name is Cannibis sativa. Use of cannabis produces a mild sense of euphoria, as well as impairments in judgment and lengthened response time. Cannabis may be smoked or eaten.

Although cannabis use is illegal in most parts of the world, the plant appears to have some potential for medical use, particularly as a palliative for glaucoma and disease-related loss of appetite, as is often seen in cancer, AIDS, and other illnesses. In some areas of the U.S., individuals whose physicians recommend the medical use of cannabis can obtain special permission.

hemp
1. A tall widely cultivated Asian herb (Cannabis sativa of the family Cannabaceae, the hemp family) which has a tough bast fiber used especially for making cords and that is often separated into a tall loosely branched species (Cannabis sativa) and a low-growing densely branched species (Cannabis indica).
2. A psychoactive drug; such as, marijuana or hashish which comes from hemp.
3. A fiber (as jute) from a plant other than the true hemp; also, a plant yielding such fiber.