Definition by project CBD, a California based non-profit educational service dedicated to promoting and publicizing research into the medical utility of cannabidiol (CBD):
Cannabidiol (CBD) is a compound in cannabis that has medical effects but does not make people feel “stoned” and actually counters some of the effects of THC. After decades in which only high-THC Cannabis was available, CBD-rich strains are now being grown by and for medical users. The reduced psychoactivity of CBD-rich Cannabis may make it an appealing treatment option for patients seeking anti-inflammatory, anti-pain, anti-anxiety and/or anti-spasm effects without disconcerting euphoria or lethargy.Scientific and clinical studies indicate that CBD could be effective in easing symptoms of a wide range of difficult-to-control conditions, including: rheumatoid arthritis, diabetes, alcoholism, PTSD, epilepsy, antibiotic-resistant infections and neurological disorders. CBD has demonstrated neuroprotective effects, and its anti-cancer potential is currently being explored at several academic research centers in the U.S. and other countries.