"cannabis" in the noun sense
1. cannabis, hemp
any plant of the genus Cannabis a coarse bushy annual with palmate leaves and clusters of small green flowers yields tough fibers and narcotic drugs
2. cannabis, marijuana, marihuana, ganja
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 effect
Source: WordNet® (An amazing lexical database of English)
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