What cannabis is
Cannabis is a plant genus that includes varieties grown for fiber, seed, flower, resin, aroma, and cannabinoid content. People often use the word cannabis as an umbrella term for both hemp and marijuana-type plants.
The part most people think of as “weed” is the dried flower from the female plant. That flower can contain cannabinoids such as THC, THCa, CBD, CBG, CBN, and CBC, plus aromatic compounds called terpenes.
The short version
| Word | Meaning |
|---|---|
| Cannabis | The broad plant family/category. |
| Hemp | Cannabis legally defined in the U.S. as low in delta-9 THC by dry weight. |
| Marijuana | Common word for cannabis grown for intoxicating THC-rich flower. |
| Flower | The harvested, dried bud people smoke, vape, or process. |
| Trichomes | Tiny resin glands where many cannabinoids and terpenes are concentrated. |
Why cannabis feels complicated
Cannabis is both a plant and a product category. It can be agriculture, medicine, adult-use retail, fiber, food, culture, religion, law, and business all at once. That is why a beginner can hear ten different explanations and feel like everyone is talking about a different plant.
The easiest way to learn it is to separate the subject into layers: plant, chemistry, product, dose, law, and personal response.
Important disclaimer
Related reading
History of Cannabis
A timeline from ancient hemp uses to modern legalization.
RelatedHemp vs Marijuana
Same plant family, different legal and commercial categories.
RelatedTHC % vs Milligrams
Convert THC percentage and weight into approximate milligrams.
RelatedGlossary
Plain-English cannabis definitions.